@noblepepper: okay, that update worked, thanks a lot. one step further. now I installed the core.
root@Arduino:/mnt/sda1# opkg --force-depends install kmod-video-gspca-ov519_3.8.3-1_ar71xx.ipk
Multiple packages (kmod-video-gspca-ov519 and kmod-video-gspca-ov519) providing same name marked HOLD or PREFER. Using latest.
Installing kmod-video-gspca-ov519 (3.8.3-1) to root...
Configuring kmod-video-gspca-ov519.
Collected errors:
* satisfy_dependencies_for: Cannot satisfy the following dependencies for kmod-video-gspca-ov519:
* kernel (= 3.8.3-1-cf85e4dc55fb28677fb803cf0f9ad60a) *
This is the last error I receive. I think I have another kernel since I upgraded to the newest firmware? Do I need to compile my own one? And how to do it if I need to?