There's a new version on the xmlminds.net site - 3.5.1 and the old one is apparently removed. I renamed the ebuild to 3.5.1, digested and it installed cleanly. I tried running it on x86 and amd64 and it appears to be OK - no extensive testing though. It would be nice to have the nev release in the tree - especially when the current ebuild is unusable.
Thanks for reporting, fixed in CVS.