Solution for using AlphaSkins and Windowblinds is in disabling of menus skinning seems. Try to disable skinning of menus when program runned under Windowblind (SkinManager.SkinnedPopups property)
i prefer the workaround of excluding my app in windowblinds the question is what is causing this problem and whether it can be fixed either by AC or by stardock (windowblinds developers)
It's a conflict between AC and Windowblinds. Cause is unknown at moment. Windowblinds replaces a system Dll's as I know, maybe some standard procedures have a little differences in behaviour…