I haven't been able to find a similar thread on this question, so I'll go ahead and ask myself.
Many of our users are experiencing a loss of text when they open AutoCAD 2012. Now technically its not a huge deal because if you close and reopen the program everything is back to normal. However, it can be annoying for the poor souls that haven't gotten a computer upgrade and it takes awhile for them to go through the close reopen process.
Of course my first thought was layers, but that wan't the case as reopening fixes it. Also it has nothing to do with which drawing is opened(i.e. legacy is not the problem).
Anyway, it seems to be a glitch in the software (maybe in our setup?). Has anyone experienced this?
Also just to note it seems to only happen when you first open AutoCAD, whether that be first thing in the morning or reopening later in the day after a break from it.