[Inkscape-user] Problem with super and sub scripts

I am a new new user of Inkscape and am having trouble getting super and sub scripts in my text. When in text mode, highlighting text and clicking the super or sub script icon all text in the text box to dissapear. If I click the icon a second time the text reappears but at an extremely large font size of over 30,and still no super- or subscript. I am using windows 7 home on one computer and windows 7 pro on another and both give the same results with Inkscape versions .48 and .92. Has anyone else seen this problem? I can get the super or sub scripts by manually moving the letter up or down but it takes a bit longer.

If anyone has a solution to this, even an operator error solution would be very welcome.

Thanks!

wlf