Good explanation of it, though I wasn't referring to using a built-in mIRC function when I suggested decompressing it by writing to a file and using another program to decompress it or using a DLL for the purpose. Still, if the functionality is already there, but "disabled", I don't see why it can just get enabled for use. Should be easy enough to do.
I still think you can remove gzip accepted file types and avoid the issue in most situations.
