Hi - Firstly, awesome plugin.
Since I installed the latest update (automatic notification of update from my Admin panel), everything works fine (as it did before), except as soon as I try to create a new Post, WP puts an error in the header of the Admin shouting that BPS is now inactive etc.
Once I sort BPS out by creating the BPS files etc via the interface, everything is cool again (except when I try to create a new post).
I've also noticed it when filtering my posts by category.
Weird - it never used to do this - only since the latest upgrade to the most recent WordPress and BPS plugin.