Problem with Yahoo in Firefox

Whenever I go to Yahoo in Firefox, it says my browser isn't supported. I have the latest Firefox and I've tried everything that I can think of Deleting Private Data, Uninstalling and Reinstalling Firefox, and cleaning the registry. I also have a problem with myspace, it always takes me to the mobile part of the site. It's almost like sites are detecting my PC as a mobile phone. I tried the sites in IE and they work fine. So how do I fix this problem guys?

I'm using Firefox 3.5.2 and can visit yahoo.com without any problems.Do you have NoScript installed? Have you allowed Yahoo.com?

All I'm using is Ad block plus, here's a screen shot of what I'm getting.

What version of Firefox are you using? It says right on the page it supports Firefox 3.Are you still using Firefox 2?

I know it says it supports Firefox 3, I am using Firefox 3. That's the problem.

What version exactly are you using? (Help->About)

3.5.2

What do you get when you go to this page:
http://m.www.yahoo.com/?

It loads up just fine.

Odd.http://www.yahoo.com/ redirects me to http://m.www.yahoo.com/ like it should.I'm not sure why it isn't directing you correctly. I thought maybe there was a "version spoof" option of Firefox that could make websites think you were using other browsers for compatibility issues, but I can't find it anywhere, maybe that was in Opera.

Err mine doesn't redirect either. Works fine in Firefox though.

Firefox does this on other sites too, but if I try to use IE they work fine. I wonder whats happening.

...incompatibility prehaps with this new version, has it happened before the update?Mine's coming up fine-I have yet to update my firefox...too lazy.
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3.0.13 is my exact version btw

Maybe I should try downgrading. :)
Edit: Didn't work, any other ideas?

I'm not sure what I'm doing different. Honest, it works just fine for me with 3.5.2What addons do you have installed?Edit:
Screenshot after I type in www.yahoo.com

Does it also do the same with IE?

@TirithRR
I have AdbblockPlus 1.1.1, Auto Shutdown-InBasic, Microsoft .Net framework assistant 1.1, Norton IPS 1.0, Norton Toolbar 3.7 (Disabled), and Daemon Tools Toolbar (Disabled). None of them are new though.
@Blade5406
No, I can load it fine with IE.Also, this has happening for a couple months.EDIT: I disabled all of my plugins and it still wouldn't work.

Hmm. I uninstalled the .Net Framework Assistant after Microsoft automatically installed it. I thought maybe that could be causing issues, but I reinstalled it any couldn't repeat the problem...I can't install the Norton stuff though, since those are integration parts of the Norton program which I don't have.

I'm sure that the add-ons aren't causing it, I've had all of them for ages, even before the problem started.

I'm pretty sure you haven't had the Microsoft .Net Framework addon for ages, since it was just released a couple months ago. :) (and caused much anger from the Firefox users).