It had been working reliably until 13.1. I will copy/paste last 50 lines from /var/log/warn here because I cannot post an attachment.
2013-12-02T15:41:58.668137-05:00 localhost acvpndownloader[1422]: Function: invokePreferenceUpdateCBs File: ../../../vpn/Api/PreferenceMgr.cpp Line: 1357 Callback interface address is NULL.
2013-12-02T15:41:58.672966-05:00 localhost acvpnui[1399]: Function: processDnldrArgsRequest File: ../../vpn/Api/ConnectMgr.cpp Line: 13130 Determine proxy: false
2013-12-02T15:41:58.673678-05:00 localhost acvpndownloader[1422]: Function: setHostnameAndPort File: ../../../vpn/Downloader/DownloaderArgs.cpp Line: 465 Defaulting to port 443
2013-12-02T15:41:58.743364-05:00 localhost acvpndownloader[1422]: Function: Verify File: ../../../vpn/CommonCrypt/Certificates/FileCertificate.cpp Line: 442 Invoked Function: X509_verify_cert Return Code: 20 (0x00000014) Description: unknown unable to get local issuer certificate
2013-12-02T15:41:58.815560-05:00 localhost acvpnagent[1428]: Function: Launch File: ../../vpn/Common/IPC/ProcessAPI_unix.cpp Line: 277 Invoked Function: chdir Return Code: 20 (0x00000014) Description: unknown
2013-12-02T15:41:58.824922-05:00 localhost acvpndownloader[1422]: Function: invokePreferenceUpdateCBs File: ../../../vpn/Api/PreferenceMgr.cpp Line: 1357 Callback interface address is NULL.
2013-12-02T15:41:58.893839-05:00 localhost acvpnagent[1326]: Function: OnIpcMessageReceived File: ../../vpn/Common/IPC/IPCDepot.cpp Line: 1047 Invoked Function: CIpcTransport::OnSocketReadComplete Return Code: -33292279 (0xFE040009) Description: IPCTRANSPORT_ERROR_UNEXPECTED
2013-12-02T15:41:58.905559-05:00 localhost acvpnagent[1326]: Function: STLoadLibrary File: ../../vpn/Common/Utility/Win/HModuleMgr.cpp Line: 149 Invoked Function: dlopen Return Code: 0 (0x00000000) Description: libz.so: cannot open shared object file: No such file or directory
2013-12-02T15:41:58.906026-05:00 localhost acvpnagent[1326]: Function: LoadLibrary File: ../../vpn/Agent/CZLib.cpp Line: 242 Invoked Function: CHModuleMgr::STLoadLibrary Return Code: -33554425 (0xFE000007) Description: GLOBAL_ERROR_NOT_INITIALIZED
2013-12-02T15:41:58.906284-05:00 localhost acvpnagent[1326]: Function: CCstpProtocol File: ../../vpn/Agent/CstpProtocol.cpp Line: 309 Invoked Function: CZLib Return Code: -31981557 (0xFE18000B) Description: CZLIB_ERROR_LOAD_LIBRARY
2013-12-02T15:41:58.923491-05:00 localhost acvpndownloader[1422]: Function: OnIpcMessageReceived File: ../../../vpn/Common/IPC/IPCDepot.cpp Line: 1047 Invoked Function: CIpcTransport::OnSocketReadComplete Return Code: -33292279 (0xFE040009) Description: IPCTRANSPORT_ERROR_UNEXPECTED
2013-12-02T15:41:58.961966-05:00 localhost acvpnagent[1444]: Function: Verify File: ../../vpn/CommonCrypt/Certificates/FileCertificate.cpp Line: 442 Invoked Function: X509_verify_cert Return Code: 20 (0x00000014) Description: unknown unable to get local issuer certificate
2013-12-02T15:41:59.032046-05:00 localhost acvpnagent[1326]: Function: enableHostMgr File: ../../vpn/Agent/TunTapMgr.cpp Line: 2369 Invoked Function: ioctl (SIOCSIFADDR) Return Code: -33030124 (0xFE080014) Description: TUNTAPMGR_ERROR_INTERFACE_CONFIG_FAILED
2013-12-02T15:41:59.032308-05:00 localhost acvpnagent[1326]: Function: main File: ../../vpn/Agent/VpnMgr.cpp Line: 1819 Invoked Function: IHostMgr::enableHostMgr Return Code: -33030124 (0xFE080014) Description: TUNTAPMGR_ERROR_INTERFACE_CONFIG_FAILED
2013-12-02T15:41:59.032529-05:00 localhost acvpnagent[1326]: Termination reason code 13: Unable to start VA, setup shared queue, or VA gave up on shared queue.
2013-12-02T15:41:59.051071-05:00 localhost acvpnagent[1326]: A SSL Alert was sent by the client during a write operation. Severity: warning Description: close notify
2013-12-02T15:41:59.052295-05:00 localhost acvpnagent[1326]: Function: OnIpcMessageReceived File: ../../vpn/Common/IPC/IPCDepot.cpp Line: 1047 Invoked Function: CIpcTransport::OnSocketReadComplete Return Code: -33292279 (0xFE040009) Description: IPCTRANSPORT_ERROR_UNEXPECTED
2013-12-02T15:41:59.057105-05:00 localhost acvpnui[1399]: Function: launchCachedDownloader File: ../../vpn/Api/ConnectMgr.cpp Line: 7082 Invoked Function: ConnectMgr :: launchCachedDownloader Return Code: 3 (0x00000003) Description: Cached Downloader terminated abnormally
2013-12-02T15:41:59.067418-05:00 localhost acvpnui[1399]: Function: processIfcData File: ../../vpn/Api/ConnectMgr.cpp Line: 3398 Invoked Function: ConnectMgr::initiateTunnel Return Code: -29622263 (0xFE3C0009) Description: CONNECTMGR_ERROR_UNEXPECTED
2013-12-02T15:41:59.082095-05:00 localhost acvpnui[1399]: Function: sendResponse File: ../../vpn/Api/ConnectMgr.cpp Line: 5291 ConnectMgr::processIfcData failed
2013-12-02T15:41:58.668137-05:00 localhost acvpndownloader[1422]: Function: invokePreferenceUpdateCBs File: ../../../vpn/Api/PreferenceMgr.cpp Line: 1357 Callback interface address is NULL.
2013-12-02T15:41:58.672966-05:00 localhost acvpnui[1399]: Function: processDnldrArgsRequest File: ../../vpn/Api/ConnectMgr.cpp Line: 13130 Determine proxy: false
2013-12-02T15:41:58.673678-05:00 localhost acvpndownloader[1422]: Function: setHostnameAndPort File: ../../../vpn/Downloader/DownloaderArgs.cpp Line: 465 Defaulting to port 443
2013-12-02T15:41:58.743364-05:00 localhost acvpndownloader[1422]: Function: Verify File: ../../../vpn/CommonCrypt/Certificates/FileCertificate.cpp Line: 442 Invoked Function: X509_verify_cert Return Code: 20 (0x00000014) Description: unknown unable to get local issuer certificate
2013-12-02T15:41:58.815560-05:00 localhost acvpnagent[1428]: Function: Launch File: ../../vpn/Common/IPC/ProcessAPI_unix.cpp Line: 277 Invoked Function: chdir Return Code: 20 (0x00000014) Description: unknown
2013-12-02T15:41:58.824922-05:00 localhost acvpndownloader[1422]: Function: invokePreferenceUpdateCBs File: ../../../vpn/Api/PreferenceMgr.cpp Line: 1357 Callback interface address is NULL.
2013-12-02T15:41:58.893839-05:00 localhost acvpnagent[1326]: Function: OnIpcMessageReceived File: ../../vpn/Common/IPC/IPCDepot.cpp Line: 1047 Invoked Function: CIpcTransport::OnSocketReadComplete Return Code: -33292279 (0xFE040009) Description: IPCTRANSPORT_ERROR_UNEXPECTED
2013-12-02T15:41:58.905559-05:00 localhost acvpnagent[1326]: Function: STLoadLibrary File: ../../vpn/Common/Utility/Win/HModuleMgr.cpp Line: 149 Invoked Function: dlopen Return Code: 0 (0x00000000) Description: libz.so: cannot open shared object file: No such file or directory
2013-12-02T15:41:58.906026-05:00 localhost acvpnagent[1326]: Function: LoadLibrary File: ../../vpn/Agent/CZLib.cpp Line: 242 Invoked Function: CHModuleMgr::STLoadLibrary Return Code: -33554425 (0xFE000007) Description: GLOBAL_ERROR_NOT_INITIALIZED
2013-12-02T15:41:58.906284-05:00 localhost acvpnagent[1326]: Function: CCstpProtocol File: ../../vpn/Agent/CstpProtocol.cpp Line: 309 Invoked Function: CZLib Return Code: -31981557 (0xFE18000B) Description: CZLIB_ERROR_LOAD_LIBRARY
2013-12-02T15:41:58.923491-05:00 localhost acvpndownloader[1422]: Function: OnIpcMessageReceived File: ../../../vpn/Common/IPC/IPCDepot.cpp Line: 1047 Invoked Function: CIpcTransport::OnSocketReadComplete Return Code: -33292279 (0xFE040009) Description: IPCTRANSPORT_ERROR_UNEXPECTED
2013-12-02T15:41:58.961966-05:00 localhost acvpnagent[1444]: Function: Verify File: ../../vpn/CommonCrypt/Certificates/FileCertificate.cpp Line: 442 Invoked Function: X509_verify_cert Return Code: 20 (0x00000014) Description: unknown unable to get local issuer certificate
2013-12-02T15:41:59.032046-05:00 localhost acvpnagent[1326]: Function: enableHostMgr File: ../../vpn/Agent/TunTapMgr.cpp Line: 2369 Invoked Function: ioctl (SIOCSIFADDR) Return Code: -33030124 (0xFE080014) Description: TUNTAPMGR_ERROR_INTERFACE_CONFIG_FAILED
2013-12-02T15:41:59.032308-05:00 localhost acvpnagent[1326]: Function: main File: ../../vpn/Agent/VpnMgr.cpp Line: 1819 Invoked Function: IHostMgr::enableHostMgr Return Code: -33030124 (0xFE080014) Description: TUNTAPMGR_ERROR_INTERFACE_CONFIG_FAILED
2013-12-02T15:41:59.032529-05:00 localhost acvpnagent[1326]: Termination reason code 13: Unable to start VA, setup shared queue, or VA gave up on shared queue.
2013-12-02T15:41:59.051071-05:00 localhost acvpnagent[1326]: A SSL Alert was sent by the client during a write operation. Severity: warning Description: close notify
2013-12-02T15:41:59.052295-05:00 localhost acvpnagent[1326]: Function: OnIpcMessageReceived File: ../../vpn/Common/IPC/IPCDepot.cpp Line: 1047 Invoked Function: CIpcTransport::OnSocketReadComplete Return Code: -33292279 (0xFE040009) Description: IPCTRANSPORT_ERROR_UNEXPECTED
2013-12-02T15:41:59.057105-05:00 localhost acvpnui[1399]: Function: launchCachedDownloader File: ../../vpn/Api/ConnectMgr.cpp Line: 7082 Invoked Function: ConnectMgr :: launchCachedDownloader Return Code: 3 (0x00000003) Description: Cached Downloader terminated abnormally
2013-12-02T15:41:59.067418-05:00 localhost acvpnui[1399]: Function: processIfcData File: ../../vpn/Api/ConnectMgr.cpp Line: 3398 Invoked Function: ConnectMgr::initiateTunnel Return Code: -29622263 (0xFE3C0009) Description: CONNECTMGR_ERROR_UNEXPECTED
2013-12-02T15:41:59.082095-05:00 localhost acvpnui[1399]: Function: sendResponse File: ../../vpn/Api/ConnectMgr.cpp Line: 5291 ConnectMgr::processIfcData failed