I'm on Windows 7, tried with Firefox and IE8.

I also had the same errors.

Mac 10.6.8
Safari5

same error for me too

any update when this will be fixed ?, having the same problem

http://typophile.com/node/87839#comment-485818

Note: it also has the error 407 and 907

FWIW, the other day I successfully inserted
a 590-pixel-wide GIF, which was around 100K.

hhp

> Note: it also has the error 407 and 907

Here is a long list of error codes from Sprint users: http://www.sprintusers.com/forum/showthread.php?t=51042

They write:   407 HTTP error 407: The request from your browser cannot be satisfied by the server. HTTP Error 407. Indicates that the client must first authenticate itself with the proxy to complete the process.    As for 907, it would follow from a bunch of previous errors.

Ah. I am using Verizon internet access. could this be my problem?

> I am using Verizon internet access. could this be my problem?

If I were you, I would log from another computer just to see if things work better.