Broken Gally and Media in WP 2.7 Beta 2-3

Greetings,
I just noticed that my gallery is broken, I mean that any page that uses the [gallery] does not load and is completely white, it does not load anything, no source code either.
Example: https://caracasballet.com/elenco

When I try to edit the page, and manage the gallery, I get prompted to download the .php file instead of loading the gallery tab on Firefox, and on IE, I just get a “Page not found” error.

Image uploading in posts and pages is also broken. The “Edit” section in the media tab, also prompts me for download.

I noticed this problem this morning, and then updated to the latest nightly build in hopes of fixing it to no avail.

So, to summarize it all up:

• I cannot upload images, stuck at “Crunching…”
• I cannot edit Media files, prompts for .php file download
• Media management in post/page edit is broken
• Simgle images work, but when a gallery is displayed, page is loaded blank (see example above)

Thanks in advance for your help