This is something wierd that happened with my installation. Everything is fine, but in the admin page, when I go to the Upload section by clicking on Upload tab, it loads the upload page, but uploadify isn't loaded, and right on top of the page where the header image is, I see the text " uploadify.js"> "

The source looks fine though, I don't know why the code gets cut off and prints "uploadify.js">" , hence uploadify doesn't load.

HOWEVER, if I refresh the page, then everything works.

As long as I click on the tab to access Upload, this problem occurs. And as long as I refresh the page, it disappears.

WIERD.

Can anyone help please ?

I guess that is the same issue that has been reported here: http://www.zenphoto.org/trac/ticket/1258

Btw, if you report things like this please always tell the browser and version.