Strange Ghost in 2.5.3 model window

I have been running Alpha2 for a while with no problems.
This morning I loaded 5.2.3 and every thing still functions OK but I am getting what looks like the edges of a window in the upper right quadrant of my model windows. The shell window also shows errors I have not seen before. I don’t know it they are related.

I am running WIndows7 64bit.
Anyone else seen this or know what I may have done wrong to cause it?


It’s caused by Measure script. If you don’t need it just turn off displaying measure lines.