Pages stop loading when using Exec PHP

Since a few days I have problems with some pages (example) where I use Exec PHP to include PHP files. While all other pages (example) are working correctly, the pages where I use Exec PHP stop rendering after <div class="entry-content">, without any error notice. Just click on the source of the example to see it.

It is strange, since the article itself does not even begin with the Exec PHP code, but first with some headings and paragraphs. The problem occured recently, without having changed anything (page itself, WordPress or Exec PHP version). I contacted my hosting provider already to ask if they know what the problem could be, but we haven’t figured out. Can anybody help? WordPress version 3.0.1, Exec PHP version 1.0 (but latests). Thank you.