This plugin is weak, I know, there was no choice. But now Is already released Adblock Plus version for Safari. Still Beta, but it works better than Adblock and is much faster. Just compare loading search on google images (when loading the same block list).

Oh, it gets worse.
The changes to Safari continue to occur with each reboot or even restart of the app.
Do you think it is malware if the developer says he didn't mean it?

Doesn't work too well on Mavericks - ads are showing and popping up quite often. I have to manually update filters several times a day to keeps ads away - it is a temporary solution though. I don't think it is updating filters what helps, I think that the AdBlock extension somehow "goes to sleep" and manually updating filters simply restores the functionality of the extension.

This is a very effective ad blocker. Works as advertised.
Highly recommended for every Safari user.

It works. It will also grind your computer to a halt. My computer was slowing down so much it was driving me crazy. I traced the problem to AdBlock which was eating 1.5GB of my 4GB of RAM. Needless to say Adblock is now gone.

Since there exist multiple (I counted 4) options, including doing the XCode 64-bit way, here's a summary:

Safari on 64-bit works with this mod from:
http://sweetpproductions.com/safariadblocker/
(Also listed here on MacUpdate)

The modifications of github are from this persons work:
http://burgersoftware.com/en/safariadblock

However, he uses the InputManager method. This has been depreciated and is NOT supported on 64-bit Applications. Apple wants the IM method to go away (google for more comprehensive commentary by some of the folks who have worked more with it).

There are also four or five forks, which I was unable to get working, looking like it had to do with the problem with IM on SL due to 64-bit.

The first mentioned build works because it uses a 64-bit build, using normal SIMBL plugins you can install via ~/Library/SIMBL/Plugins

It also takes care of installing SIMBL, using the 0.9.7a (at this time of writing) SIMBL plug.

I also assume GlimmerBlocker works, since it is NOT an InputMananger but instead proxies all your traffic as if you were on a corporate LAN and having all traffic filtered via a regular HTTP proxy. It's a great alternative solution, using components from the Mozilla Project, and is available opensource as well.

Hopefully this clears up some confusion.

Causes Safari 4.0.3 to load pages forever when enabled. For example macworld.com

Hope this is fixed soon.

Yes, Ad block worked great until this update. Now, it breaks Safari completely. No web access.

How careless and irresponsible to release such a thing to the public without full testing!

For me, this update also caused Safari to not be able to navigate to any web pages. I've been using Safari AdBlock for some time now and this is the first update to really break Safari. I don't have any other plug-ins or Input Managers installed so I'm not sure where the conflict is coming from.

This app blocks the Google Analytics javascript, which kind of sucks. Google Analytics doesn't bother users in any way and hurts statistics for Web developers.