I had all these headaches with Tinn-R on Vista - tried reading all the
message boards, reconfiguring .Rprofile, etc... ...no luck.
I finally gave up and started using Eclipse with StatET. Now, it's actually
easier to run RCMDs to check and release a package, and with SVN integration
in Eclipse (with a plug-in), it's also easier to check code in and out.
The only drawback is, the font-coloring isn't as nice as Tinn-R, but that's
configurable - I will set it up to color like Tinn-R.