Hi Lemoncide,

Strange that even though you tried updating the drivers, it didnt work and from your post what I feel is more to be a software issue rather than a hardware issue as you mentioned that skype or any other programs works fine.
When you say you updated the drivers and softwares, did you just install on the existing drivers/softwares or did you try uninstalling and then reinstalling them back. If you had not tried it, would request you to try that and see if it works.
To my knowledge there is "Webcam Center" that I presume you are using and "Webcam Central" software which is an updated version.
You can find the latest Webcam Central Software from the link below. So first get the old software and drivers completely uninsatlled(try this from the Device manager and also from the Control Panel) restart the computer ensuring its removed totally then download the latest updated software and then restart again and then check
http://tinyurl.com/7g2cndh

Here are some other responses on the same kind of issue that you are facing which could help you.
http://en.community.dell.com/support-forums/laptop/f/3517/t/19331874.aspx