Bug in RebGUI table widget?

I may have stumbled on a bug in RebGUI's <table> widget. I am building a GUI for SOFTINNOV's mysql-protocol. When the user selects a MySQL table I want to display its contents in a <table> widget. This should have as many columns as the MySQL table has "fields" (also called columns in MySQL). The point here is that I need to set the number of columns in the <table> on the fly. There is an accessor function <set-columns> for that purpose. However, after changing the columns, the action of clicking the column header (which should result in sorting the table by that column) gives a run-time error on the execution of the folowing code: <sort/skip/compare parent-face/data cols col> (line 294 in the TRAC version of the code, see http://trac.geekisp.com/rebgui/browser/widgets/table.r#L294). It appears that the variables <cols> and/or <col> are not correctly set after <set-column> is called. The script below will provoke the error. Rudolf W. MEIJER REBOL [] do %rebgui.r window: make block! [ panel -1x-1 data [ tb: table 100x40 options [ "col-1" 'right 0.33 "col-2" 'right 0.33 "col-3" 'right 0.33 ] data [1 2 3 4 5 6] return button -1 "Set-columns" [ tb/remove-row [1 2] tb/set-columns ["col-1" 'right 0.5 "col-2" 'right 0.5] tb/add-row [7 8 9 10] ] button "Exit" [quit] ] ] display "Test RebGUI table" window do-events