I think I might go back to 1.87 (or stay at 1.88 if it keeps the fps up) - I think there is something wrong with 1.89.
Didn't they fix a pretty major shortcoming in the latest version?
If I recall correctly, the older versions weren't compatible with DEP (Data Execution Protection) meaning that executables generated with them won't run on newer CPU's (& operating systems) which support DEP... For future compatibility, you'll want to make sure your program complies with that.