All,
I found a performance fix for Flare that might affect performance for you guys. The bleeding-edge version has the fix:
https://code.google.com/p/flare-engine/source/checkout
I also patched one "uninitialized variable" bug that might have been causing the crash-on-startup problem you were...
Hey it's my game! Glad to see people enjoying it. It's still in alpha so I understand if you want to wait before publishing this.
As for runtime errors -- doublecheck file permissions? Depending on how you did the svn checkout/update, you might end up with non-read-access files. It doesn't...