Same problem , on multiple websites across the web.

Same problem everyday. Is this a virus?

I am also on a Mac. I am on an Intel desktop running OS 10.6.4 and Firefox 3.6.7.

Oh, and by the way, occasionally a window with slightly different text pops up. The one I attached above shows a Firefox box that says, "You have chosen to open fan.php from http://www.connect.facebook.com" and the one I'm attaching to this message says, "You have chosen to open SetToolbarLoad.php" from http://statistics.wibiya.com" but for the most part I get the message that says, ""You have chosen to open like.php from http://www.facebook.com in Text Edit."

The same problem has surfaced in the last couple of days on my laptop - Windows XP. Several different "you have chosen to open" .php files from facebook. like.php being the most common. I don't use facebook at all. I am in China, so need a vpn link to access it anyway.

I have not updated anything recently (at least not intentionally) and this only started 2 days ago. Other posters seem to have had the problem for much longer. I don't seem to have any add-ons or toolbars which could trigger this, and it is becoming rather irritating. Sometimes several different individual requests to open a .php while opening a single web page.

Any updates on this? I'm trying the fix shown here using adblock.

http://crstffr.tumblr.com/post/578927604/block-facebook-like-button

Its always one of those Facebook buttons that causes the error. Sometimes like.php, sometimes login_status.php and sometimes connect.php.

This problem seems to be more widely spread then just with Facebook like buttons - sometimes when I click a link, the download box pops up. If I then cancel & try again, it might work - or I get the download box again. I haven't yet found a pattern or explanationas to why this is.