mangrumsNet

I've seen the threads on turning off Smooth Scrolling in Advanced -> General but it doesn't help with a couple of sites.  One I use all the time is Google Reader.  Scroll lag while using that service is absolutely the pits.  It worked fine before upgrading to Karmic so I'm not sure what changed.  Here is the only thing that has worked for me so far:  intall the pre-release of FF 3.6 instead.

In Applications -> System -> Software Management, click Settings then Edit Software Sources.

Click Other Software and add the line

deb http://ppa.launchpad.net/ubuntu-mozilla-daily/ppa/ubuntu karmic main

Optionally you can add the deb-src line, but I usually keep those deselected.  When you are done it will prompt to reload the cache.  Let it do that and then close.

You then have to add the gpg key so it won't get cranky when trying to install packages from that source.  In a terminal window type

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 247510BE

Now you can run the last command to get squared away.

sudo apt-get install firefox-3.6

Install all the dependencies as prompted and you are good to go.  The icon should be in Applications -> Internet -> Namoroka.  Scrolling is (reletively) happy again!  Keep in mind that at the time of this post, FF 3.6 is still pre-release and may contain other bugs.  This process might be considered by some as a lot to go through to fix a scrolling problem.  I would almost agree but it reeeeeeally bothered me.