On Windows 7: switching on Compact mode causes the Avant window to become corrupted. The toolbar section goes pale, parts become transparent and text is either missing or partially drawn. Dragging the window about makes parts flicker transparent and then opaque.
Minimising and then restoring the window fixes it. Right clicking and being lucky to find the spot that gives the correct menu and switching Compact mode off does not fix it, only minimising and restoring.
viewtopic.php?f=6&t=28307
viewtopic.php?f=6&t=28408&start=0