Great... now I'm getting this error after installing Wireshark from a tar.gz Any idea how to remove something after doing a ./configure, make, make install?

Have a look in /lib/firmware, the file name has the version number as part of it.

Try make uninstall. Hopefully that will do the trick. By the way, if you install from source, you might have a look at the checkinstall program. It can create RPM files that make life easier. It replaces the make install step.

To be honest, I'm really starting to believe that Fedora has patched something somewhere to cause this. I never have to touch the ipraw module for anything (although to be honest, wireshark is the only program I use that need promiscuous mode). Without any error messages, I'm just taking random shots and that probably isn't going to help much. What we probably need is someone MUCH more familiar with Fedora than I am. You might ask the mods to move this thread to the Fedora forum or ask on a different forum dedicated to Fedora.

sudo make uninstall worked. Now I know! I have tried posting in Fedoraforum.org, no response whatsoever.

As far as the firmware version... I'm not seeing anything close to iwl3945.fw. The only thing that I can find is a iwl3945.ucode and iwl3945-1.ucode. This is strange.

I'll try a different distro, maybe an Ubuntu live CD and see if it works. I'll do that tonight and post my results.

The problem is you can't count on make uninstall because a LOT of source packages don't have it. That is what really got me using checkinstall (until it broke on Slackware and was more than replaced by src2pkg).
It's possible Fedora renamed it. However, this is a binary blob that nobody can alter, so you could get the newest firmware from the intel wireless site, put it in /lib/firmware and see if that helps. I would back up the existing firmware files just in case you need to roll back and you'll probably have to have only one set of iwl3945 firmware files in /lib/firmware.

That wouldn't be a bad idea. When it comes to wireless, Fedora is a notable standout in the Linux world, and not in a good way.

Just an update... Ubuntu 8.04 doesn't seem to want to connect to any networks on the Live CD. Need more time, I'll post back later.

Well... I feel awfully f*cking stupid. I was trying to run Wireshark as sudo, not root, and it would crash. Running it as root (su) appears to have fixed the problem.

However, once running, it's impossible to browse websites, but it does intercept most of the packets it seems. It is a little... jumpy, glitchy... use whatever word you want. Is this normal? Just a side effect of the 3945 driver?

That's odd. I mean I do occasionally see a difference between su and sudo, but I use sudo all the time to run wireshark. I'm guessing there is some path or permissions differences between sudo and su that are the cause. Nice pick-up on your part because I wouldn't have guessed this one.

It isn't a side effect of the driver, at least if my rig is any indication. I can run wireshark and browse without any problems. In fact promiscuous mode shouldn't prevent any traffic, otherwise tools like Snort wouldn't be usable. Again, I'm going to guess it is something about the way Fedora handles the driver. It seems to behave differently on your machine than it does on mine.