URL to some images throwing off a 404 error

Hi –

Recently (I want to say withing the past two updates) some of my images will no longer link out to their full URL. I can see images inside posts, but when using lightbox or when trying to view them directly, a 404 error is given.

Example: http://momneedscoffee.com/wp-content/uploads/2011/03/erinbump.jpg

Even when I navigate through the directory, such as here: http://momneedscoffee.com/wp-content/uploads, I can see the image and the resized versions. The resized versions work, but the original image does not.

It’s hit or miss but it’s been the last few times I’ve tried to upload and use photos. Previous photos are working and the lightbox works as well. (I’ve disable lightbox thinking that was it, but it wasn’t.)

I’ve changed permissions, reinstalled via dashboard, deleted the files and uploaded again and again. I’ve also reset the permalinks and fiddled with the upload folder name. I have to say it’s starting to drive me a bit insane.

Would love some input/suggestions on how to go about fixing this.