Right, so last night I disabled a vBulletin module that may be responsible for some of the 500 errors.
The thing is, it's tricky to diagnose with precision (since there may be other factors at work), so we'll have to keep an eye on the error log to see if it was the cause or at least a significant factor.
I had one or two since, but nothing like as many as previously. How's everybody else doing?
Seen it for days. Just saw it again. Refreshed the page and it appeared again.
#6