libpng16 does no longer read icons

Hi,

since a recent opensuse online update, I can't load png-type icons any more. The icons are to be loaded within a Qt application.
Error messages are:
libpng error: bad parameters to zlib
...
libpng warning: iCCP: bad parameters to zlib
...
libpng warning: Image width is zero in IHDR
libpng warning: Image height is zero in IHDR
libpng error: Invalid IHDR data

From various sites on the internet, I find that this is probably be caused by a change in libpng16 with respect to earlier versions.

Unfortunately, I can not revert to some older libpng version, because Qt uses libpng16.so.16.

Is there any solution to this?

Thanks and Best regards
Bernd