FF2 cursor issue when using combo features

[damo]

To reproduce:

1. Open sample
   
2. Add text
   
3. Ensure cursor is at the end of a line of text
   
4. Use font size combo to select a different font size
   

Results:

Cursor is no longer at the end of the line of text. It appears as if the cursor has "disappeared". When a user uses the mouse to position the cursor into the same location, the selection from the Font Size combo is ignored.

[fredck]

It happens also with other style features, like bold and italic. It's limited to FF2 only.

[fredck]

Fixed with [3770].