I've got the completion set-up to complete from a document-parser and a preference item. The parsed completions still work, but it's stopped pulling completions from the preference item. I've checked the item name in the bundle editor and the finder, and even tried re-creating the completions from scratch, to no avail.

It works while it's still lowercase, once it goes upcase it doesn't work anymore.

thomas Aylott — subtleGradient — CrazyEgg — sixteenColors

Yes, you need to be matching lowercase letters. But sometimes the match fails anyway.

I just tested again and it seems to be working. This is the worst kind of bug, one that pops up randomly. I'll try to nail it down more specifically and get back to you.