boto commit 111f600 broke version parsing in S3boto. The issue manifests only when using boto's trunk.
The fix is as simple as replacing line 27 in s3boto.py with:
boto_version_info = tuple([int(i) for i in boto_version.split('-').split('.')])
Confirmed, I noticed this too, went back to a stable version.
Thanks for the fix - will incorporate asap!
Issue #157 was marked as a duplicate of this issue.
Properly handle boto dev versioning, fixes #152
→ <<cset 058390cd7773>>