Trying to stress synfig by low/high res - quality up/down - zoom in/out - cairo on/off , seems to be stable (debugmode!)
I have noted a rare render between q6 and q7 on voria logo that appear if cairo is ON:
Development version:
Revision: 20130423
Branch: master
Revision ID: c494af
Built on Apr 23 2013
Built with:
ETL 0.04.15
Synfig API (006000)
Synfig library 47
GTK+ 2.24.10
GNU G++ 4.6.3
Using:
Synfig 0.63.05
GTK+ 2.24.10
DEBUG BUILD