I'm focusing on a Wordpress-based project, and that i just added a brand new template towards the installation by uploading a template file. I had been developing a new page which will use my new template, when all of a sudden, the "Template" dropdown within the "Page Characteristics" box is finished.

I'm using Wordpress 3..1.

Update: I saw a website which explained to revert towards the default template, and to my custom template. Apparently it labored, however i am still baffled on which triggers this bug. Also, any extra understanding or pointers about this bug will be a great help since my job requires me to patch this (and perhaps submit the bug fix to Wordpress). Thanks!

I'd the identical trouble with WordPress 3.2.1. I added a brand new template and also the menu disappeared in the page add/edit screen. The answer ended up being to switch to the default twentyeleven theme finish then back to my custom theme. The templates drop-lower started showing up again.

BTW, you stated "revert towards the default template, and to my custom template" but I am confident you meant theme. I am speculating in which you saw it was here:

http://wordpress.org/support/topic/template-file-drop-down-not-appearing

Appears like this bug has been around for a few years a minimum of. I filed a study: http://core.trac.wordpress.org/ticket/18324