I have an almost identical problem - after minimizing I often can't maximize the Game!! but in my case the game crash - the error messages appears and the game quit to a desktop. I tried to switch to other renderers as StepS suggested but it still didn't solve the problem. And there are 2 different types of the crashes - one occurs often, and the second one (graphical) sporadically. Sometimes no error message appears, but the game is stucked on the taskbar and cant maximize and some graphical glitches show on the screen. All that things occurs almost everyday, they are starting to be annoying and a pain in the butt.
crashes 1-13 while using DirectDraw (32bit) (crash 13 is the one that occurs sporadically)
crash 14 while using DirectDraw (8bit)
crash 15 while using Direct3D 9 (shader)
I also got a crash on Direct3D 7 but I did not care to save the crash logs.
I put all crashes logs as an attachement
crashes - cant maximize the game.zip
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