Font Size Spontaneously Changes

[MikeC3]

Having a very strange issue.  Running an executable application under LabVIEW Runtime 2014 SP1 (patch f3, I think) on Windows 7 SP1.  The application has a few typedeffed system enums on the front panel.  After some amount of time (between 1 to 15 days is as precise a report as I have so far), the text of the drop down menu (not the main control) reduces font size to the point of being unreadable.  I can still select each item in the enum and the correct action results, so it appears to be just a cosmetic change.  I'm not even sure how I would intentionally do this, let alone why it appears to happen spontaneously.  If I exit and restart the application, everything goes back to normal.

Anyone seen anything like this?

[JKSH]

Does the user have multiple screens? I've noticed that when one LabVIEW window is moved to a screen with a different resolution and/or different DPI, all LabVIEW windows will change size. (I haven't seen the font shrink by itself without changing the window size, though)

[MikeC3]

Update on this (with pictures!).

Have now replicated this issue in our lab environment.  It takes between 7 and 8 days to show up, and affects both system and classic enums.

A possibly related issue that happens at the same time is the font size my screen title changes (seemingly spontaneously) from 91 to 4.

Normal (taken after a system restart)

Smaller:

 

JKSH - The user's computer have only one screen, and this application takes up the full screen.

[ShaunR]

Is you IT department remote desktop-ing into the machine? (clutching at straws here)