Hello Andrew, this is with Ubunut 12.04 fully patched. Using Qt version 4.8.1 in /usr/lib/x86_64-linux-gnu - latest git pull too.
I noticed that the 3.1 community and the Pro version both use the same prefs. Is this good? (So far, it only messes up placement of the custom scripts panel - as these are only in my pro installation.)
In the simple drawing below, saved from CE (community edition) I cannot see any faults in qcad CE, but when opening the file in PRO, all the dims are gone