hucste on "Zenpage problem after update content page"

Hello, onto my zenphoto gallery, i've this problem:

I've update the content of one page ; and after click on the button 'Apply', nothing is displaying on the webpage.

http://zenphoto.dev.stephane-huc.net/pages/ZenPaypal-Plugin

It's a multilinguage page... EN and FR.

This problem not exists on others pages.

I explain:

In this zenpage script pages.php modified, for my plugin zengeshi, i call your getPageContent() function. In this case, after updated my content to publy and inform the new version of zenpaypal, no content is displaying because the return of function is empty ; but the content is in database.
I've pasted the content value on http://paste.ubuntu.com/5640102/

I've attempting to modify others pages, and result not problem.

I don't know the reasons.