I'm drifting, dunno if that really counts. Trying to get rid of some bugs of WTF level that I only see in my own machine and that I can't really use to justify my paid time, so I'm getting stressed out by the minute (after a few days already) while I try to figure it out and go back to regular work.
Can you whole-world clone the entire stack you're working on/with?
1. Verify the bug exists in your whole-world clone
2. Chop bits out of one of the copies until the bug goes away, and/or see if you can copy the whole world to another machine (which you've probably already tried)
Alternatively, perhaps let fixing this bug go, and as was suggested, use another machine (or a VM, if that's fast enough and it "fixes" it) for now. You might figure it out while you work on something else.
This position is horrid to be in :P but letting go right now in this situation is sometimes the least long-term damaging solution.