If you go to control panel>All Control Panel Items> Display Settings are you set to anything other than 'smaller'.
Sonar is designed for smaller and I have had this issue. It actually destroys the touch screen capability of hi-res laptops, as everything is too small.
You'll also notice that anything you click on that create four white corners when selected

is affected by this. Any Pro Channels not created by Cakewalk are fine (as they do not do this) and VSTs, just the cakewalk stuff. If you try the Quad EQ for example, it's nuts.
So set to 'smaller' in display settings, or use a mouse with a scroll option.