Cannot sign in to LinkedIn with Firefox/IE

I had the same problem after trying to change my primary mail address:
http://getsatisfaction.com/linkedin/t...

has anyone found a solution to this yet?

FIXED THIS ISSUE ON A MAC - CHANGING THE MTU SETTINGS ON WIN SHOULD DO IT TOO, I DON'T KNOW HOW TO CHANGE IT ON WINDOWS THOUGH

I'm on a MacBook Pro on 10.5 and have had this issue with LinkedIn and some other sites. My laptop could not get in, but my wife's 13"MacBook could - leading me to think it was a laptop issue after I played with the router settings and it wasn't fixed.

I just got in and fixed this issue by changing the MTU on my Mac. To do so:
- Go to the Apple Menu
- Choose System Preferences
- Choose Network
- If you're on wireless, choose Airport (otherwise choose Built-in Ethernet) then click the Advanced button on the bottom right.
- Click the Ethernet tab at the top right
- Change Configure from Automatically to Manual
- Change the MTU to 1000
- Click Apply and try getting in to LinkedIn, it should work.

See Apple Help for more info if you need it:
http://support.apple.com/kb/HT2532

A person wrote this about an hour ago:

I was experiencing kind of the same problem under XP, using Firefox or IE, on wireless or cable connection.
I've tried a lot of things, but the thing that helped was this:
to change the MTU network setting from 1500 to 1200.
Don't ask me why but it worked directly. An easy way of doing this, is by using a small tool called DrTCP, you can get it here: http://www.dslreports.com/drtcp
Then in the tool, select the network connection(s) you're using, and change or set the MTU to 1200. Restart your network connection (disable/enable) or totally restart your pc and now try to login and load the Linkedin website....

I'm very happy and thankfull for this guy because hios solution resolved the problem for me too (I was unable to access linkedin for about 8 months).

Hope it works for you too