So I know this is a problem which has cropped up from time to time around here but none of the threads around here seems to give a definitive solution.
My front page has been throwing a 404 over the last few days (only for non-logged in users). I clear cache and it's fine for a while, until I notice it again or someone writes in to complain.
I realize there are about a zillion possible factors behind this and it's virtually impossible to replicate or isolate.
But - since I know this is a common problem, has anyone kept track of some of the most common things that cause this? And how to put a more permanent solution in place? Right now I can only fix it when I notice it...