Site is down but I can still access admin panel.

My site is down too, I just updated a few plugins, secure wordpress, feedburner and security scan.

Resolved on my part, it was an issue with “Secure WordPress” not updating properly. I renamed it to temporarily disable it which allowed me to bring the site back up and then I updated it again and it fixed the issue. Not sure if you have the same type problem though. Have you updated anything recently?

I updated plugins as always since my WP is the new one plugins needs to be updated to though

Do what thatruth2006 did, rename the plugin that you just updated and see if that works.

Or if you just upgraded WP, try uploaded all WordPress 3.2.1 files to your server again. Maybe the system had a hiccup.

I had it back when I remove all the plugins must check it one by one

Yeah, in cases like this focus on the most recently updated plugins. You don’t have to remove all of them, just go one by one and rename each of the recently updated plugins (I just add an _1), try to load your site, if it doesn’t work, name it back and go to the next one until you find the one that was the issue.

How to check the recent updated plugins btw?

You would have to just keep track as you are updating them, I tend not to do mass plugin updates at once.