You need to test in as many themes as possible, but at least: arialist fusion standard leatherbound a few others with dockable blocks Open a course with lots of sections Dock the Settings (2.4) / Administration (2.5+) block Pop the block out Confirm that the block is shown correctly and the width is pretty normal Resize the window such that the block will be taller than the window* Refresh the page Reopen the block Confirm that the block width hasn't changed Confirm that the scroll bars for the block are at it's edge (and not in the middle