Reverting a mini panel resets all block configurations

I'm seeing an odd interaction of Mini Panels and block configuration in RC1.

1. I've defined mini-panels in code (using the instructions and patch here: http://drupal.org/node/530104)

[See first screenshot of block config before]

2. If I make changes even one mini panel using the the interface, then push new code, I'll need to revert to have Panels3 pick up the new code.

[See second screenshot of mini panels setup]

3. When I do revert, all of my blocks become disabled -- and any block configuration disappears. That includes config for any other mini panels (even those that have not been touched). Config for any non-panels blocks disappears, too. All blocks are changed to disabled.

[See third screenshot of block configuration afterwards]

Expected behavior: Ideally, I would expect that reverting a mini panel would not touch block configuration at all. Or at most, that only the mini panels reverted would need to be re-done in the blocks configuration.

Anybody have troubleshooting suggestions?