A cache file may grow out of bounds when Server Admin checks for server software updates from behind an authenticated web proxy. This issue affects Mac?OS?X?Server v10.5 and Mac?OS?X?Server v10.6. In some situations, the cache file may rapidly fill all free space on the boot volume and cause the server unexpectedly stop or restart
Source:Mac OS X Server v10.5, v10.6: Cache file grows out of bounds when using authenticated web proxy
