[Bug 744808]

[A-eibach]

Well, this animal here is still running Iceweasel 10.0.4, but I think that doesn't matter.
Nvidia card yes (GeForce FX series). Running nouveau drivers, no proprietary ones.

What Artem said in his initial post, proved WRONG on my machine. I had
IW 3.6.13 for quite a long time, and it always worked marvellously, even
with "difficult" sites.

However: this has visibly changed once I decided to move over to a new libc and base system.
Since then, I recognize the following:

- Tab switching from $COMPLEX_SITE_1 to $COMPLEX_SITE_2 takes literally ages (up to 3 seconds)
(People claimed to cure this by applying the Ubuntu (!) version of libcairo 1.12.* (which, unline the current (!) non-testing Debian version does without server gradients) but frankly, that rather resembled some voodoo magic. No significant changes with that "tweak" on here, whatsoever.)

- Scrolling with Javascript-heavy sites is a nightmare.
I'll try to describe:

Site scrolling movement always seems to "hang behind" the mouse wheel.
So you would press the mouse wheel *gently*, and with a decent delay,
the page would scroll down resp. up. Yeah, it's like some satellite
communication back in the 1980s :) You'd crack a joke, and 30 seconds
later the person on the other end bursts out laughing :) It's very odd.

You would

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https://bugs.launchpad.net/bugs/744808

Title:
  image sprite is packed very asymmetrically - triggers poor rendering
  performance in firefox3 and missing icons in firefox4 and konquerer

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