Folding - "Could not extract core"

I was wondering why my points production had decreased lately. Apparently, Folding has been repetitively downloading the Core_65.fah file and never starts processing the work unit. I installed the latest version of Folding (v.5.02) and deleted the "work" directory. In Terminal, Folding displays the following:

{
- Calling './FahCore_65.exe -dir work/ -suffix 02 -checkpoint 15 -verbose -lifeline 3863 -version 502'

Warning: Ignoring unknown arg
Warning: Ignoring unknown arg
Warning: Ignoring unknown arg
Warning: Ignoring unknown arg
Warning: Ignoring unknown arg
Folding@Home Client Core Version 2.47 (June 14, 2002)

Proj: work/wudata_02
Done: 22852 -> 142979 (decompressed 625.6 percent)
Error: Work unit read from disk is invalid

Folding@Home2 Core Shutdown: CORE_OUTDATED
CoreStatus = 6E (110)
+ Core out of date. Auto updating...
- Attempting to download new core...
+ Downloading new core: FahCore_65.exe
Downloading core (/~pande/OSX/PowerPC//Core_65.fah from www.stanford.edu)
Initial: DEAF; + 10240 bytes downloaded
Initial: 39DE; + 20480 bytes downloaded
Initial: C3E2; + 30720 bytes downloaded
Initial: 8092; + 40960 bytes downloaded
Initial: 74E6; + 51200 bytes downloaded
Initial: F262; + 61440 bytes downloaded
Initial: 6AA9; + 71680 bytes downloaded
Initial: F46F; + 81920 bytes downloaded
Initial: DC9A; + 92160 bytes downloaded
Initial: 4E9B; + 102400 bytes downloaded
Initial: F10E; + 112640 bytes downloaded
Initial: 2E3D; + 122880 bytes downloaded
Initial: CBB0; + 133120 bytes downloaded
Initial: 6CF0; + 143360 bytes downloaded
Initial: 3DD4; + 153600 bytes downloaded
Initial: D51E; + 163840 bytes downloaded
Initial: C669; + 174080 bytes downloaded
Initial: CD8F; + 184320 bytes downloaded
Initial: 2F31; + 194560 bytes downloaded
Initial: BFE0; + 204800 bytes downloaded
Initial: 83FD; + 215040 bytes downloaded
Initial: 9F48; + 225280 bytes downloaded
Initial: 48D1; + 235520 bytes downloaded
Initial: D18B; + 245760 bytes downloaded
Initial: FB49; + 256000 bytes downloaded
Initial: B9EE; + 266240 bytes downloaded
Initial: 8B39; + 276480 bytes downloaded
Initial: 32C5; + 286720 bytes downloaded
Initial: BF67; + 296960 bytes downloaded
Initial: AA51; + 307200 bytes downloaded
Initial: 6190; + 312660 bytes downloaded
Verifying core Core_65.fah...
Signature is VALID

Trying to unzip core FahCore_65.exe
- Couldn't open file FahCore_65.exe
+ Error: Could not extract core
+ Core download error (#2), waiting before retry...
}


I deleted the original FahCore_65.exe file from the Folding@home directory and emptied the Folding work unit queue. It looks like there was a bad TINKER work unit in the queue, because the Core_65.fah file (TINKER) was extracted and the Gromacs core loaded after I tried again to run Folding.