I had an issue where literally after switching viewports to check a few things and back to model space I lost the abality to double click to edit text and the delete key (keyboard) didn't work. Solved by removing and reinstalling fresh. Now I just noticed that the default lineweight (set at the default .25mm) is listed as -.03 in the layer manager. Even if I set the default to something like 1mm and back again its still listed as -.03mm. It's not affecting how anything looks or plots. Just wierd and a little annoying