Drag and drop rearrange fields, "hick-up"

Strange thing... since last night, when trying to rearrange order of fields in a view... position the mouse on the cross (in front of the field) makes arrow change to a cross. Than after trying to drag and drop, the "cross" is there all the time insted of the arrow, and the rearrange-window thinks I am still holding it pressed, so the fields just jump up and down, making it not possible to make rearrangement, and save it. seen this before?

drag and drop works outside views, for instance rearranging menu item order