RVM 1.0.2 fails to build ruby 1.9.2

This fails every time. I ran rvm remove 1.9.2 and then rvm install 1.9.2.

The error looks like this:

info: Applying patch '' (located at /)

error: Er开发者_如何学Pythonror running 'patch -F25 -p1 -f <"/"', 
       please check /Users/peter/.rvm/log/ruby-1.9.2-p0/patch.apply.*.log

fail: There has been an error applying the specified patches. 
      Aborting the installation.

And the log shows this:

[2010-09-05 19:38:14] patch -F25 -p1 -f <"/"
patch: **** read error : Is a directory

This worked fine with rvm 1.0.1.

Any idea what's up and how I can roll back rvm to 1.0.1?

For me, simply running rvm update (without --head) let Ruby 1.9.2 install right.