Anyone know what is causing this in my job log:

2010-11-19 00:28:59 avtar Info <5548>: 2010-11-19 00:28:59 Eastern Standard Time: Automatic cache flush of C:\AVS\var\f_cache.dat
2010-11-19 00:28:59 avtar Info <5069>: - Writing cache file C:\AVS\var\f_cache.dat
2010-11-19 00:29:02 avtar Info <5546>: - Cache update complete C:\AVS\var\f_cache.dat (176.0MB of 255MB max)
2010-11-19 00:41:11 avtar Info <5100>: Status 2010-11-19 00:41:11, 429,808 files, 7,276 folders, 10.01 GB (157,067 files, 435.5 MB, 4.25% new) 425MB 17% CPU  D:\bpa\cache\26814\+(128_135_318_320_323_325_328_330_335_524_525_528_15160\ignore\BlogPulse#www.quadandjet.com#11.16.2010#post5347_0.xml
2010-11-19 00:46:28 avtar Error <5775>: Internal Error: backtree: bad response 853e270a6c2703bcb4b3408462366765ca57c715 597667 ADD_HASH_DATA=2 serial=597667 seq=0 flags=R:N:0 kind=15 rsp=MSG_ERR_INVALID_PARAMETERS
2010-11-19 00:46:28 avtar Info <5726>: Aborting backup due to error (3:EXC_HFSERROR)
2010-11-19 00:46:28 avtar FATAL <5399>: Internal error, aborting
2010-11-19 00:46:28 avtar Info <7833>: Finished at 2010-11-19 00:46:28 Eastern Standard Time, Elapsed time: 0001h:20m:17s
2010-11-19 00:46:28 avtar Info <6149>: Error summary: 2 errors: 5399, 5775
2010-11-19 00:46:28 avtar Info <8418>: Sending wrapup message to parent
2010-11-19 00:46:28 avtar Info <5314>: Command failed (2 errors, exit code 10014: Internal failure)