Ok, i finally found the root cause :)
The next update will fix Android 2.3 issue.
It took me couple weeks to figure this one out.
I initially thought it's Android bug in 2.3 garbage collector + NDK upgrade they made.
But it wasn't... it was actually a bug in my assembly code :(
I still don't understand why it didn't appear previously.
Anyway, this fix also might help to increase a small performance.