I've been having this problem with hardy since yesterday... I think it may have something to do with powertop (and one of the options it changed for me).

Anyway, what happens is, when I'm using wireless and browsing my connection APPEARS to drop every few mins.... i.e. firefox could not find page. But I can ping my router the whole time this is happening, so it doesn't appear to be a 'wireless' problem as such.

But, the fact that:

1) it doesn't happen when I plug in wired
2) My other winxp PC on wireless works fine

confuse me.

Anyone have any ideas? It's driving me mad. Thanks