Webcamstudio modprobe fails causing boot to hang

[dadsy]

After upgrading from 10.10 to 11.04 without too many dramas (I couldn't get the gnome-theme-icon package but got around that), upon the reboot it hangs after showing

install: cannot stat `webcamstudio.ko': No such file or directory
make: *** [install] Error 1

 * Modprobe webcamstudio failed. Please use 'dmesg' to find out why.

The vboxdrv modprobe also fails but it gets past that.
Everything I've found refers to problems with the 2.6.38-9 Kernel but I'm using 2.6.38-13 (other users say their problem was fixed by installing the 2.6.38-11 kernel).

Has anyone got any ideas before I go for a clean install?

[dadsy]

I managed to remove webcamstudio and move onto the next problem, boot hanging at check battery state.
I removed webcamstudio by

sudo apt-get remove webcamstudio

For the check battery state, after mucking around with reinstalling nvidia drivers, I came across some text saying

 kernel source for this kernel does not seem to be installed

I ran

 sudo apt-get install linux-headers-(insert kernel version here)

I then rebooted and have got a working system. There's still a few bugs but I'll get to them later.