Over the past weeks we have seen strange behavior from some Nisus Pro documents.

The problem is in resizing fonts. Only one font: Century Old Style Standard, and Adobe font. When trying to resize text from 14 points to 12 pts, using the down-arrow button in the character palette, the font will go from 14, to 13, and then back up to 14, rather than down to 12. Typing in 12 fails also. I can however, re-select the same font from the character menu, and can then change the size to 12. But when the document is saved, closed and reopened, the font size is back to 14 pts. If I change the font to another font, and back to Century, things are OK until I close and reopen the document, and again the resizing is lost.
I can, however, work with other fonts without this problem occurring. I have used the font book to validate the font (Century...), and I have used a program to delete the font cache on the computer, and I have deleted and reinstalled the font, and none of these steps solves the problem.
At first it was only one file which had this problem, but now it is occurring in others as well.

I thought this was exclusively a font problem, but with the steps I have taken, I can only assume that there is some Nisus related element as well.
We updated to the latest version of Nisus Pro, but that did not solve the problem either.
I emailed this info to tech support, together with the file and the font, and have not received an answer for days. Is there anyone out there who can shed light on this puzzling and frustrating problem?