Using the Observations tab as an example (this issue probably ocurrs in other places also).

In the various list boxes are the columns supposed to be manually resizable? If they are supposed to be then they ain't. If they are not supposed to be could this become a feature request?

Aha!!! Double checked. The Object: columns can be resized manually. None of the others can. i.e. the list boxes found in 'Observing Session Data', General and Attachments.