There is something strange with Vu+ remotes, I noticed this on mine.
To fix:
MENU > SETUP > USER INTERFACE > BUTTON SETUP
Press the EPG button on the remote and you should see what the button is configured for. It should be 'Show graphical multi EPG'
If not press CH-/CH+ button so that the entry is highlighted and press OK to delete
Now press OK on the EPG section of the list and click OK on on the 'Show graphical multi EPG' and green button to save.
Exit out and it should be working. I will try and see why it's doing it on Vu's and get it sorted.
Thanks for letting me know, I'd just written it off as an anomaly.
I think if I had a support thread it would just get lost within a few days as I don't have as many users as the big boys :)