Creating a plane causes Solidworks 2010 to freeze

Today I was creating a solid part and tried to create a plane via the reference geometry button.  This caused the program to freeze.  Subsequent tries also caused this.  Just to check, I tried creating a plane in a different file...the same result.  I can create any of the other reference geometries no problem (incl. centerline, point, etc.)

I haven't updated the program recently, so I am not sure what could be the cause.  As far as I know, the other functions I commonly use work correctly.

Anybody else come accross this?

By the way, I have uninstalled and re-installed, to no avail.  Although, I did not clean the registry or anything like that in between.

Any ideals?

Much appreciated.

Brad.

SolidworksParts And Features