Quote:
The beta before these two betas from the new system, i got around 2.5% less CPU load

This two last betas now i get " not valid WIN32 aplication" too.
I`m on XP and this problem was occured to other software (don`t remember what) but the solve was from the compiling . Developer reported that he was not included some options when compiling to be XP backward compatible and that is why it gaves "not win32 application" error.
So i guess you compiling to a new compiler on a Win7 may be or some 64 bit Win ?
Yes, it has to be something like that. But, as far as I know I should be using settings that are even still compatible with Windows 95... I guess I'm missing something.
Edit: Should be ok again in the next beta. Turns out that the latest Microsoft compiler by default generates binaries that don't run on XP (!). Going back further than XP (Win95, Win98) isn't possible at all anymore.