This is easy to reproduce:
Error while decoding frame paint_with_video_decoder: ouch, decompression error 2 Unhandled error while processing packet from peer (..) File "/usr/lib64/python2.7/site-packages/xpra/window_backing.py", line 104, in paint_with_video_decoder decoder.free_image() File "codec.pyx", line 87, in xpra.x264.codec.Decoder.free_image (xpra/x264/codec.c:1397) AssertionError
It happens every time (or almost?) one resizes a window. This looks like a race condition - as if the client was resetting its decoding context *after* trying to play one wrong frame?
fixed in r977 - will apply to stable 0.3.x branch after further testing
feel free to re-open if you can still reproduce this bug
this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/144