If you’re having difficulties with Media uploads in WordPress 2.5.x, you’re not alone. The good news is, there are some good answers at the WordPress Support Forum. Start with this WP Forum post, which summarizes the most frequent bugs.

I’m using that post as a checklist right now. Yes, I’m having (minor) problems with one of my WordPress sites.

If you’re wondering why I included the image at the right: It was a test to see if my current problem was the image. An image that’s too large or flawed (garbled or missing image code) can cause difficulties.

That particular picture (Kilmallock Abbey, Kilmallock, Ireland) wouldn’t upload at another WordPress site that I manage. By testing it here, I can see that the image isn’t the problem.

In other words, if you have more than one WordPress installation running on the same server, you can rule out some problems by trying the same task in the other WP install.

(I’m about to overwrite my previous WP install, to see if one of my files was corrupted. You can always overwrite your files if you follow the extended steps that are recommended for upgrading WordPress.)