The file size limit in the stable versions is 4GB, this limit is broken in aMule CVS.
I think I did report this already (as well as the mldonkey import script permission problem), but here's the link:
ed2k://|file|aMule-2.1.3-installer.exe|7224428|71A3F72F4672735B30F351BE9148B16F|/
The 2.1.3 archive is working fine, btw.