>What's the difference in response time for a combo box based on an array compared to a table or cursor? The number of items is around 4500. I'm looking at an app that was built using arrays. I generally use tables or cursors. It works ok on the development machine, but on another test machine that is slower it seems very cumbersome.

Combos crash and burn with so many rows. A grid would be much better suited for a rowset of that size.