Copy in KDE and Diskette Activity

Hi, I just noticed that whenever I copy text in KMail, the system accesses the diskette drive (and when there's no diskette there, which is most of the time, it's kind of noisy). This happens (apparently) in all native KDE applications (I tried Konqueror, the desktop, KAddressBook and KCalc) but not in other applications (I tried Mozilla, Gaim and a jEdit, a Java application). As far as I know, this only started happening recently, possibly just today, though I almost always have the radio on and it's possible I simply have not noticed it before now. Does anybody have any idea what's happening and why, and possibly how I can prevent it? Thanks. Randall Schulz