Rubymine 2.0 RC2 issue

I've just started using RC2 and notice this

If I edit a file the name in the tab is prefixed with * as expected, and the colouring changes (I'm using subversion)

If I undo my edits with Cmd+Z then the file name goes back to black, but the * stays there, even when I save it. If I close the file then re-open it the * is still there.

I'm getting this error a lot too, don't know if it's related

Argument 1 for @NotNull parameter of com/intellij/pom/references/PomService.convertToPsi must not be null: Argument 1 for @NotNull parameter of com/intellij/pom/references/PomService.convertToPsi must not be null
java.lang.IllegalArgumentException: Argument 1 for @NotNull parameter of com/intellij/pom/references/PomService.convertToPsi must not be null
 at com.intellij.pom.references.PomService.convertToPsi(PomService.java)
 at