(Well, let's assume what your log says isn't crazy, so you're on an older version. I guess that's all I really need to know!)
if you're on 64 bit.
I'm on 32 bit, so:
but after playing around, I decide the old version isn't fixing the problem, so:
ray@phoenix:/tmp$ wget http://us.archive.ubuntu.com/ubuntu/pool/universe/libw/libwebcam/libwebcam0_0.2.0-1_i386.deb
--2013-02-24 18:16:27-- http://us.archive.ubuntu.com/ubuntu/pool/universe/libw/libwebcam/libwebcam0_0.2.0-1_i386.deb
Resolving us.archive.ubuntu.com (us.archive.ubuntu.com)... 220.127.116.11, 18.104.22.168, 22.214.171.124
Connecting to us.archive.ubuntu.com (us.archive.ubuntu.com)|126.96.36.199|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 23884 (23K) [application/x-debian-package]
Saving to: `libwebcam0_0.2.0-1_i386.deb'
100%[==========================================================================================================================================>] 23,884 --.-K/s in 0.1s
2013-02-24 18:16:28 (161 KB/s) - `libwebcam0_0.2.0-1_i386.deb' saved [23884/23884]
ray@phoenix:/tmp$ sudo dpkg -i libwebcam0_0.2.0-1_i386.deb
[sudo] password for ray:
Selecting previously unselected package libwebcam0.
(Reading database ... 184568 files and directories currently installed.)
Unpacking libwebcam0 (from libwebcam0_0.2.0-1_i386.deb) ...
Setting up libwebcam0 (0.2.0-1) ...
Processing triggers for libc-bin ...
ldconfig deferred processing now taking place
and then I answer 'y', etc.
ray@phoenix:/tmp$ sudo apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages have been kept back:
The following packages will be upgraded:
1 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.
Need to get 26.0 kB of archives.
After this operation, 18.4 kB disk space will be freed.
Do you want to continue [Y/n]?