There were some problems with Japanese language input on OS X 10.6. One was for a call that is only available on OS X 10.7+ so there is a workaround for that using an old call that is deprecated in 10.7.
The others were in platform-independent code so could affect other platforms. The second problem was reading from a NULL pointer - in the previous version this read beyond the end of a zero-length allocation. The third was in failing to display a Japanese character at the start of a line and was caused by a mistake in converting to using a std::vector.
A folding bug was fixed for Haskell.