Af er a w ek of se ere pa k t lo s it se ms to fin lly have g ne away. (If you t ink p cket l ss su ks on a r al li k, you s ould see w at it d es to a dial up l nk!)
I have been scratching my head daily, working to figure this out. Is it the ISP? Is it the modem? Has something gone amiss with my house wiring? No, it is a kernel problem.
I recently moved from my old reliable Fedora Core 3 system to Fedora Core 6. They were nice enough to drop support for FC3, so you pretty much have to play along and move forward. Let me assure you: in this day and age an operating system is not made for dial up networking. I have been working for almost a month to get updates in... and I am almost there. (Fortunately, a Linux box is at least dial up friendly enough to put in updates in single packages, unlike that other major OS vendor that wants you to download one huge ass chunk.)
If I were a monster geek, I would even track my update process with some sort of graph or something.... oh wait, I am a monster geek.