6f1783470e249c60b8a96956f2f0ed564efaf107
The "root" bone in an Auto-IK chain was never added properly if it didn't have a parent that it was connected to. This meant that if it had axis-locking (using transform locks), these would not get converted to temporary IK-locks. This also affects 2.49 The second part of the bug report though, is something more ingrained in the IK-solver internals (numeric error, which means that even locked axes aren't exactly untouched).
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