@juliean and as I see, problem occurs exactly here _Mysb::getloc(). If I watch for _Plocale variable, it is NULL, but in normal should be “C”

@frob I looked in a call stack, there is nothing I can see because excpetion occured in dll file msvcr80.dll

I think this part of the docs is of use to you if you want to manually manage when assets are loaded.

I advise trying some benchmarks as well, even if you can face some extra issues to solve, cause I can't imagine another way out here - it's impossible to apply any of the A/B tests, unfortunately. 
Just think over what you are going to test and try it  (some piece of it at least). In case …