I was using the 32 bit version anyway, but I didn't know that a new version had been released. I just installed the 32 bit, and thought it might be a bit flaky also, because when I opened it, it popped a dialog saying that it wasn't compatible with the presets, and would make new ones, but then another window opened, saying that it had failed, and the log file indicated that the file was open elsewhere, even though HandBrake was closed prior to me opening it. I reopened it without the error dialogs, but it still makes me wonder.
I scanned the changelog, and though there was a lot of changes, it appeared that they were all just updates, rather than new features. I haven't used this new version yet, but was wondering if you had actually noticed an improvement of any kind?