HTTP error when uploading meda

Hi everyone,

For the past two days my site has been facing the (apparently infamous) HTTP error when trying to upload anything through the media library. I don’t think anything was changed between when it was working two days ago and when it stopped working. Here’s what I’ve tried so far:

I’ve disabled all plugins
Updated all plugins and WordPress itself
Deleted and reuploaded the WP-admin and WP-includes folders
Checked my folder permissions
Added to my .htaccess file: `<IfModule mod_security.c>
SecFilterEngine Off
SecFilterScanPOST Off
</IfModule>`
Tried from a variety of computers, browsers and networks
Tried the default to GD plugin

I’ve also talked to GoDaddy support for ~4 hours over the past few days. They first recommended a clean WordPress install, which I did but didn’t work. Then thought the site was infected, but Sitelock scans came up clean. Then told me it had to be a WordPress issue and not a hosting issue.

The site, if it helps at all, is:

downtowndevil.com

Anyone have ideas? Please let me know if more info is needed. Thanks!

UPDATE: Small images (90×120, 115×70) are now working, but 500×300 still aren’t.