I upgraded from silverstripe 2.4 to 3.0.5. At the beginning, all seems to work fine, after I upgraded my site like documented. At a certain point, my site seems to crash the admin area. The site is running fine, only the admin area isn't function. When you try to edit a page of the site you get wired text out put and the admin area stops working. Pressing the reload button, all is fine, I can edit the page, pressing save, the same picture. I need to reload. I took a screen shot of the wired text look.
Any idea?

Thanks for your help!

Marcel