Do not know what phase of the description can not be edited.

http://seesse.com/zenphoto/cache/tmp/ceshi/93351373af3db56488a64f7a2b1c0d5bebdb647b.png

Sorry, seems I cannot access that image, it loads forever. Try to upload a smaller image than 1.7MB mabye.

I am sorry.

http://seesse.com/zenphoto/tmp/ceshi/--------2013-06-24-18-24-23.png.html

I cannot answer. it should look like this:
http://www.zenphoto.org/screenshots/zenphoto-admin/album-edit.jpg.html
You again have to look into browser and server logs. Since you said you are behind a proxy that probably might affect all kinds of things.

Also see if disabling the tinyMCE plugin helps. Maybe a Javascript issue as well.