Unable to remove files within ./cache/. Please check directory permissions.

I woke up this morning to this lovely error on my forum: "Unable to remove files within ./cache/. Please check directory permissions." I checked my file permissions and they were indeed correct. It seems my host was having server issues. I reported the problem and they fixed it right away. Disaster averted.

If you encounter this problem and it's not your host, the usual solution is to make sure your cache folder is set to 755 (777 on some servers) and that the files in the folder are set to 644 (666 on some servers). If your on a Windows box you should be fine; if not make sure your folder is set to be readable and writeable.

I'm running phpBB3 and it works great. This is the first error that has come up since installation some months ago. In a way I'm sort of glad it wasn't a phpBB3 issue. But now I'm worried about the server I'm on...