Jeff Davis comments:
In fairness to Arch it's worth noting David Wheeler's conclusion:
"Personally, although I'd be happy to use subversion on others' projects, I
personally plan to use GNU Arch; its warts are numerous, but I think they'll
be rapidly fixed and GNU Arch has a tremendous amount of promise." I agree
100% though that the wierdness of arch is tremendously frustrating.
My affair with subversion is too preliminary to say I won't doing the same (using separate SCM for public/private coding) if the cygwin or native Win32 port stabilizes.
Here's part of the arch vs. CVS debate on the postgresql mailing list