Fighting page zoom with tiled maps

I like the automatic page zoom with Firefox 3, it rocks, for text. It kinda sucks with images as they get stretched and it looks rubbish and blurred. This is a problem with tiled maps, as they just shouldn't be scaled like that.

There are a few workarounds out there but none seem great. I would like to be able to disable page zoom, or even better would be detecting the page zoom and then maybe decreasing the tile grid size so that when the tiles are zoomed to match the screen resolution, they actually end up at the same resolution.

Can anyone shine some light on this issue?