Hi, > I have not much experience, but it seems like it's not that bad... > maybe I should check how m32BitIndicies is initialized? and I did it - and it turned out there was case when it was uninitialized... looking for this without all your help would be really hard :)... the issue is solved and you were right - it's not gcc issue :) thanks again for great new technique of looking for bugs, for sure will come in handy few times! cheers, Andrzej.