I seemingly randomly get the following entries in cache.log : 2012/04/26 09:48:07 kid1| WARNING: 1 swapin MD5 mismatches 2012/04/26 09:48:07 kid1| Could not parse headers from on disk object 2012/04/26 09:48:07 kid1| WARNING: An error inside Squid has caused an HTTP reply without Date:. Please report this: 2012/04/26 09:48:07 kid1| StoreEntry->key: 046717E59AE72DE6AAD977A3A61FFED3 2012/04/26 09:48:07 kid1| StoreEntry->next: 0 2012/04/26 09:48:07 kid1| StoreEntry->mem_obj: 0x80974ae00 2012/04/26 09:48:07 kid1| StoreEntry->timestamp: -1 2012/04/26 09:48:07 kid1| StoreEntry->lastref: 1335422887 2012/04/26 09:48:07 kid1| StoreEntry->expires: -1 2012/04/26 09:48:07 kid1| StoreEntry->lastmod: -1 2012/04/26 09:48:07 kid1| StoreEntry->swap_file_sz: 0 2012/04/26 09:48:07 kid1| StoreEntry->refcount: 1 2012/04/26 09:48:07 kid1| StoreEntry->flags: CACHABLE,PRIVATE,FWD_HDR_WAIT,VALIDATED 2012/04/26 09:48:07 kid1| StoreEntry->swap_dirn: -1 2012/04/26 09:48:07 kid1| StoreEntry->swap_filen: -1 2012/04/26 09:48:07 kid1| StoreEntry->lock_count: 2 2012/04/26 09:48:07 kid1| StoreEntry->mem_status: 0 2012/04/26 09:48:07 kid1| StoreEntry->ping_status: 2 2012/04/26 09:48:07 kid1| StoreEntry->store_status: 1 2012/04/26 09:48:07 kid1| StoreEntry->swap_status: 0 2012/04/26 09:48:07 kid1| assertion failed: store.cc:1868: "isEmpty()" 2012/04/26 09:48:11 kid1| Starting Squid Cache version 3.2.0.17-20120420-r11555 for amd64-unknown-freebsd9.0... 2012/04/26 09:48:11 kid1| Process ID 90536 2012/04/26 09:48:11 kid1| Process Roles: worker 2012/04/26 09:48:11 kid1| With 30000 file descriptors available 2012/04/26 09:48:11 kid1| Initializing IP Cache... 2012/04/26 09:48:11 kid1| DNS Socket created at 0.0.0.0, FD 6 2012/04/26 09:48:11 kid1| Adding nameserver 127.0.0.1 from /etc/resolv.conf 2012/04/26 09:48:11 kid1| helperOpenServers: Starting 10/450 'squidGuard' processes 2012/04/26 09:48:11 kid1| helperOpenServers: Starting 10/200 'upload_stop.sh' processes 2012/04/26 09:48:11 kid1| Logfile: opening log stdio:/usr/local/squid/logs/access.log 2012/04/26 09:48:11 kid1| Logfile: opening log stdio:/usr/local/squid/logs/store.log 2012/04/26 09:48:11 kid1| Swap maxSize 51200000 + 5242880 KB, estimated 4341760 objects 2012/04/26 09:48:11 kid1| Target number of buckets: 217088 2012/04/26 09:48:11 kid1| Using 262144 Store buckets 2012/04/26 09:48:11 kid1| Max Mem size: 5242880 KB 2012/04/26 09:48:11 kid1| Max Swap size: 51200000 KB 2012/04/26 09:48:11 kid1| Rebuilding storage in /usr/local/squid/cache/ (dirty log) 2012/04/26 09:48:11 kid1| Using Least Load store dir selection 2012/04/26 09:48:11 kid1| Set Current Directory to /usr/local/squid/cache/ 2012/04/26 09:48:11 kid1| Loaded Icons. 2012/04/26 09:48:11 kid1| HTCP Disabled. 2012/04/26 09:48:11 kid1| Configuring Parent 192.168.1.124/9080/0 2012/04/26 09:48:11 kid1| Squid plugin modules loaded: 0 2012/04/26 09:48:11 kid1| Adaptation support is off. 2012/04/26 09:48:11 kid1| Accepting HTTP Socket connections at local=0.0.0.0:3128 remote=[::] FD 51 flags=9 2012/04/26 09:48:11 kid1| Store rebuilding is 0.85% complete 2012/04/26 09:48:14 kid1| Done reading /usr/local/squid/cache/ swaplog (470297 entries) 2012/04/26 09:48:14 kid1| Finished rebuilding storage from disk. 2012/04/26 09:48:14 kid1| 470291 Entries scanned 2012/04/26 09:48:14 kid1| 0 Invalid entries. 2012/04/26 09:48:14 kid1| 0 With invalid flags. 2012/04/26 09:48:14 kid1| 470285 Objects loaded. 2012/04/26 09:48:14 kid1| 0 Objects expired. 2012/04/26 09:48:14 kid1| 6 Objects cancelled. 2012/04/26 09:48:14 kid1| 0 Duplicate URLs purged. 2012/04/26 09:48:14 kid1| 0 Swapfile clashes avoided. 2012/04/26 09:48:14 kid1| Took 3.28 seconds (143238.17 objects/sec). 2012/04/26 09:48:14 kid1| Beginning Validation Procedure 2012/04/26 09:48:14 kid1| 262144 Entries Validated so far. 2012/04/26 09:48:14 kid1| Completed Validation Procedure 2012/04/26 09:48:14 kid1| Validated 470284 Entries 2012/04/26 09:48:14 kid1| store_swap_size = 12653092.00 KB 2012/04/26 09:48:15 kid1| storeLateRelease: released 0 objects [: -: bad number which is to say the least annoying Looks like broken cache but I wanted to get a second opinion before I delete it.