MTEXT invisible when editing

[Borgster]

I sat down to work on a project I haven't worked on in over a week. No, all of the sudden, when I try to edit mtext, as soon as I double click the work I want to replace the text itself becomes invisible in the editor. The change I type in DOES take effect and when I am done the text is fine. However this is very annoying. No one else has used my computer since me and I have made no changes to any settings. Suggestions?

AutoCAD 2013 64 bit
Windows 7

[StDoodle]

I've had this happen, randomly, in 2012 (also 64bit under Windows 7). Saving & exiting & reopening has always worked for me, but I have no clue why it happens, or what might trigger it, unfortunately.

[kiwigraham]

I have the same issue currently, on and off, in the same file.
A "REA" does fix it but not it seems permanently
I'm also using 2013, 64 bit, windows 7

[kiwigraham]

Futher to my earlier post, I've found that the error reoccurs after building/rebuilding a C3D surface. Why that should be, go figure! At least REA still fixes it