For web pages, the scroll position is retained when switching tabs. For text items, the cursor position (and the scroll position to make the cursor position visible) is retained when switching tabs.
I have occasionally seen the rich text control display a disabled scroll bar when there is text to scroll (still accessible via the keyboard). Restarting UR fixes this problem in my tests when this happens. This behavior appears to be a glitch in the MS rich edit control. You might experiment with different versions to see if it works better for some.
http://www.kinook.com/Forum/showthre...?threadid=2853