OK. I posted the mentioned file to alt.binaries.test. alt.binz says it contains 34/36 blocks. QuickPar recognizes only 33/36.
The header is
Test Post for ABZ - Diablo Bug Example [2/7] - "alt.binz-DiabloBug.zip" yEnc
The zip file contains the corrupted RAR archive and the small PAR2 file.