Opening that xkcd comic will show it in such a lower resolution on my nexus one that i can't even read the text.
Edit: This happens regardless of any network agent messing up with my data. I tested via Wifi, serving a big image in my own webserver in my own local area network.
Also, happens on every browser, hence why i think it is a webview issue. Tested on Stock and Dolphin.
I notice this issue since the earlier 2.3 official roms, even though now i'm usig cyanogen nightly.