I don't know if it's the appropriate place for feedback on RStudio preview...
I'm using v. 1.2.1327 on windows 7.
Two problems :
A blinking pixel appears in the console or the editor when focused (at a different frequency than the cursor and at different locations).
On the current release of RStudio, if I copy a file from the Windows file manager, when I paste in a string in the editor RStudio pastes the full filename (with the slash as the separator) ; that's very handy. In Rstudio preview it doesn't paste anything.