Urban Giraffe Support

I'm running ver 0.2.15
Everything was working swell, but then, out of nowhere, new posts we're being retrieved by the search (old ones were).
I took a look at the wp_search DB table, and saw that the new article were being indexed alright (the content appears right, and the Priority terms are filled correctly). Also, the search index total number of items is increased whenever a new post is added.

Disabling the plugin and reverting to the old WP search returns the missing results. Reinstalling the plugin, performing manual re-index and changing the search type don't yield results.

Any thoughts?

The site is www.advancedqtp.com.