I am running IE9 and just tested Portal 2.8 and 2.9. I can drag the column divider left or right to change the width. I cannot test 2.7 at the moment, but can’t imagine it would be any different. IE9 can cause some problems with some functionality of BMC products, but the divider pane appears to be fine.
Have you tried adding the Portal site to Compatibility View?
great, that did the trick. I switched to "Compatibility View" and its now working!
Thanks for your help.