I ran into this on my latest project.
The non-rotated text is fine, but notice the defect in the rotated character B. This seems to happen on the leading character only, and only causes problems for some fonts. If you download the project, select the rotated B, and choose feather, you can definitely see that there is an undesired artifact present.
Rotated text bug.mpc
As this seems to affect the leading character only, I was able to work around this by inserting a period before the B and then wiping it out with a zero-depth carve (I actually use .001 depth to keep the software from complaining when flashing the project). Unfortunately, this workaround is not applicable to every project.
I'm running 1.175, but I think the bug is not unique to that version.
Also, paste quit working - it could not be used. I had to close and restart Designer to get it to work.