We purchased the PageBlaster module just last week and installed on module in our development server. Certain pages seem to have issues with Page blaster. One such page is where we have used the Free text box control. (freetextbox.com).
The buttons for this WYSIWYG editor doesnt show up and gives error. But the moment the Pageblaster references are removed from the "web.config", the page works fine.
See the attached image. I tried doing what was suggested by the freetextobx control, but that didnt help.