My Compaq CQ60 webcam also doesn't work with 3.0 kernel shipped with Ubuntu. It's not a Logitech but I'm hopping it's a similar fix :)
Bus 002 Device 002: ID 04f2:b091 Chicony Electronics Co., Ltd Webcam
I installed kernel 2.6.39-02063904-generic and it works correctly...
My Compaq CQ60 webcam also doesn't work with 3.0 kernel shipped with Ubuntu. It's not a Logitech but I'm hopping it's a similar fix :)
Bus 002 Device 002: ID 04f2:b091 Chicony Electronics Co., Ltd Webcam
I installed kernel 2.6.39- 02063904- generic and it works correctly...