RDPClip.exe uses 4GB ram

Hi,
 
On our TS servers we experience sometimes (0-4 times a month) that rdpclip.exe uses above 4GB ram.
The users say they only cut/copy/paste in excel, word and outlook (All 2007 version) not anything else.

Is there a way to see what is going on with the process?

All servers are 2008 standard.
2 TSGW and 6 TS servers.

All fully updated both with windows and office updates.

Anyone got an idea to what I can try to resolve this issue or get more info on it?

I'm not allowed to remote control(Shadow) the users before contacting them.

/Brian