Controlling the width of work items on developer's taskboard

Is it possible to control the width of the work item columns in the developer's task board?

Today, I observed that when the contents of the screen are too wide, switching to the 'planned time'-viewmode and back to developer's taskboard actually resizes the notes on the board.
It doesn't last long, though - if I wan't it wider and close the side-bar, the task board width again exceeds the screen width. Re-showing the side-bar doesn't undo that - you have to switch between planned time and task board views again..


Any ideas?

Well.
Now, it's tracked as a defect