I've just had a strange thing happen while using the search function. Searched for several terms -- example "shepherd's plaid" -- and got list of results, but when I click on a thread title I get 500 Internal Server Error page. If I remove the "?highlight=shepherd's+plaid" from the URL, then the thread loads up correctly.

Not every search term bounces like this, but if the search result URL includes the "highlight=" it seems to trigger the 500 Internal Server Error. I don't know why some search results include the highlight function and others don't.

Anyway, I found the work-around but thought I would point out the issue to those who could fix it.