Wordpress missing thumbnail after uploading images

Hello, on the chance that someone here might be able to help, I am reposting here the following inquiry I put up over at WordPress support forums. I am wondering if the culprit might be here at Dreamhost.

The missing thumbs sounds pretty random. What's the URL of your site?

-Scott

Unfortunately, the site is behind a private wall. Any theories?

While I am not familiar with that plugin, it seems to me that it is more likely the issue lies with the plugin than with some DreamHost settings (of course, I could be wrong, but I am thinking that if it was a DH setting issue, all of the images might have been impacted).

The fact that the thumbnails worked for some images, but not others, makes me suspect there may bee some difference in the images - are they all the same file type? From the same source? Maybe edited with different tools?

I think finding out why the software treated pic 3 and 4 differently than the others would be a good place to start troubleshooting.

--rlparker

Are the missing thumbnails for themes in the wp-content folder?

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Yes, we're working on that right now. So far we're not seeing differences, but there are few ideas left to try. In the meantime, we work around it by creating the thumbnail ourselves and uploading it. It's funny. When the thumbnail is uploaded, WP makes a thumbnail of it...

Yes, all the images are in the wp-content/uploads/ directory.