In ksnapshot When drawing the rectangle -
I start at the top left hand corner;
I then move the cursor to the bottom right hand corner.
On Slackware Current the rectangle follows the cursor slowly. I have to keep moving the cursor around the bottom right hand corner, of the rectangle I want, until the rectangle is precisely where I want it to be, i.e. the cursor position. This process can take upwards of 10 to 20 seconds.
On 14.0 the rectangle still follows the cursor slowly, always has done, but I have no difficulty in getting the bottom right hand corner, of the rectangle, precisely where I want it to be.