Thanks for reporting back. The Python issue is resolved and will be in the next release.
Your second point needs much more information for us to address it at all:
- What are you doing when it freezes?
- does it come back to life?
- What's in your logs?
- Is it reproducible (randomly implies no but I have to ask)?
EDIT: I moved this to a separate topic to keep it specific to issues you've found rather than the 10.2 Alpha release post.