[shazzla]

Yes ,its for compression. Just to avoid future problems (maybe).

At decompression : as i said ,some additional parameter required to bypass this checksum error.
As the author of SREP said somewhere in a post,the compressed data IS NOT CORRUPTED. Its a bug in SREP.
If i remember correctly,this parameter is some kind of 'ignore crc'...

Edit :

Maybe its :

-hash-

Just add it to your arc.ini/srep section...
Give it a shot or i dont know....