After update to latest dev-version (2010-07-11) I have strange problem:
1. I have two content types - type1 and type 2 and they use the same cck-field "field1".
2. I have been created faceted search set for content type1 with faceted range for field "field1" - it's worked perfectly.
3. Then I was tried to create faceted search set for content type2 without faceted range and I've got the error: in faceted block I see range preset, previously created for content typle1.

After downgrade to previous version, problem gone away.