I'm using rvm along with a default ruby of 1.9.2 v0:
Greg:~ greg$ rvm list
rvm rubies
ruby-1.8.7-p302 [ i386 ]
=> ruby-1.9.2-p0 [ i386 ]
Greg:~ greg$ rvm -v
rvm 0.1.46 by Wayne E. Seguin ([email protected]) [http://rvm.beginrescueend.com/]
Greg:~ greg$ ruby --version
ruby 1.9.2p0 (2010-08-18 revision 29036) [i386-darwin9.8.0]
Greg:~ greg$ ruby -v
ruby 1.9.2p0 (2010-08-18 revision 29036) [i386-darwin9.8.0]
I'm not sure what the current version of rvm is, but 0.1.46 seems to be working correctly. You might want to try doing rvm update
to get the latest rev if you're running an older version.
Your best solution for rvm help is to go directly to the author, Wayne Seguin, either on the RVM site or on #IRC at irc.freenode.net. The RVM site is http://rvm.beginrescueend.com/.
Wayne's a great guy, very helpful and quick to respond.