key-press-event event clears cell in treeview

[dhk <dhkuhl optonline net>]

I have a key-press-event connected to my treeview so a Tab can be used 
to navigate through the cells.  It work well except that when the Tab is 
pressed it clear all the data in the cell.  If I use the mouse to move 
to another cell the data remains.

My callback doesn't touch the data.  All it does is get tree paths, 
columns, and then grabs focus and sets the cursor on a cell.  None of 
that should clear the data in a cell . . . should it?

Does Anyone know of any reason for this?

Thanks,

dave