Recently SKYPE released version 5.0 software. The HP HD-3100 and HP HD-3110 Webcams with firmware revision 1.0 produce an error message when used with SKYPE version 5.0. The error message in SKYPE is:
Can't start video renderer. Check you've got a valid DirectX installation.
The Webcams work correctly with SKYPE version 4.2. They will work with SKYPE version 5.1 due to release in January 2011.