On occasion, when doing a CTRL/F to bring up the find dialog, the dialog comes up maximized.
Also, it is not uncommon for an opened window to come up with a title bar only. Sometimes when this happens, it continues to happen for every dialog box opened thereafter. When that happens, one cannot close the application, because there is no way to answer the confirm exit dialog, so one has to actually kill the application. Upon an application restart, everything is well again.
This happens in both Windows XP and Linux. I'm currently using version 6.0.2, but I believe this has happened with prior releases, though,as a relative newcomer, I have not used many prior releases.