HTTP error 0

I just upgraded to Commons 2.0. When I attempt to upload an image with a .png extension I get the following error message:

An HTTP error 0 occurred.
/drupal_commons/filefield/ahah/wiki/field_content_images/0

There is no filefield/ directory under /drupal_commons/

The image is actually uploaded as verified in an SSH terminal window, but the front end does not indicate success. Interestingly, this error does not occur when uploading an image with a .jpg extension.

I just did a manual install of GD2 with lib-png Could it be an issue with GD2? An problem with the Upload Progress meter perhaps?

I searched through the Drupal archives, and I tried some of the suggestions there but to no avail. I thought I should see if anyone else using Commons has had this same issue.

According to a post at http://drupal.org/node/329913, "I´ve had the same bug (http error 0) and fix it by change the option on the ImageAPIi config site. I change the default image processing toolkit fro ImageAPI GD2 to ImageAPI ImageMagick." I looked at this, but the GD2 Image toolkit seems to be tightly integrated with the Commons setup.

Thanks in advance.