WordPress › Support » WP Super Cache sometimes ignites a blank Home Page! Need to restart Apache - sounds exactly like my problem, but it's already a year old. Seems to be some combination of many parts. For now, I've turned off APC, as it also produces strange messages in the error log, for which there are no really satisfying comments on the net to find. Somehow, the whole PHP stuff is really shitty. Too many parts coming from too many different places and all somehow but not quite working together. Basically, everything runs, but as soon as you want to get a grip on the performance problems, there are all sorts of strange and inexplicable effects. All just wild hacks.