TAdvPopupMenu paint problem

First of all, I want to say that TMS Components are very useful and using them, we have enhanced our applications in numerous ways. Keep up the good work!

However, after replacing TPopupMenus with TAdvPopupMenu, we have encountered problems with painting. See the following images (the yellow and red stripes were added by the person who discovered it).



We are able to reproduce it on Windows Vista, but not Windows 7 or Windows 8. The person who has reported it claims it happens to him both on Windows 7 and Windows XP.

I tried removing the styler, but nothing changes, so I guess it's not a Styler issue.

Does anybody have an idea what could be wrong, and how to fix it?

Could someone give me an advice on this? It's becoming a serious issue.

I've found that setting TAdvPopumMenu.OwnerDraw seems to help, but not in all cases. Also, restarting the program sometimes fixes the issue.