Compatability with Zend Optimizer?

After installing the trace module I receive a blank screen. I cannot access my site through a web browser. It seems to be similar to the Zend Optimizer compatability issue described for the devel module project: http://drupal.org/project/devel.

Is it?

I have deleted the trace module and its associated variables from the systems table, cleared the site cache yet I am still experiencing these symptoms (on multiple computers). When I visit my site URL there is some process inserting a ''variables' blob into my cache table. I'm guessing that some part of the Drupal bootstrap process is working but then Apache is encountering a problem.

I should mention that I uploaded the boost module into the modules folder around the same time but I didn't change the .htaccess file or enable the boost module.

Is there a way to debug this process (given that I can't see anything through a web browser?) and I'm working on Windows?.