gui_digitize will not load properly

[christoph]

after refreshing the site everything seems to work

error message on my machine

"Warning: Your script possibly relies on a session side effect"

This error message corrupts the JS code

[christoph]

For a start, I added the following lines to map.php

ini_set('session.bug_compat_42',0); ini_set('session.bug_compat_warn',0);

but we need to find out what causes the problem.