VNC / X Server not responding to continuous key presses

I've noticed that the VNC server distributed with Fedora Core 9 does not respond to continuous key-presses (e.g. hold down a key and expect to see the character displayed continuously on the display). This did not occur in Fedora Core 8. I've seen this behaviour on the PPC and x86-64 distribution of Core 9. I've also used three different VNC clients (RealVNC, TightVNC, and Chicken of the VNC) and seen the same results, so I seriously doubt it's a client issue. I've installed the current release of VNC server for Core 8 on my Core 9 system and saw the same behavior. This has lead me to believe that it's not a problem with VNC as much as a problem with the X server. Has anyone else seen this problem? Any ideas on how to correct it? It's mostly a nuisance, but one that I'd like to fix! Regards, --Scott Kidder