I've just installed a Logitech C310 webcam on my Ubuntu Oneiric machine, and I've got several problems. When I use cheese, if I set it to use the higher resolutions, the picture contain shadows and has distorted colors. Only with lower resolutions the picture looks okay. The above photos were taken with cheese.
In addition, the camera's internal microphone didn't always work. When using it through pulseaudio, the sounds were fast and with high pitch. When using it directly through alsa it sounded fine.
EDIT: I moved the sound part to a new question.