ReferenceError: $ is not defined

Hi how can i check that jquery really is loaded because dolphin is making zips of .js so how can i check if it's loading correctly yesterday i upgraded to 7.3.3 it seemed to work perfectly buth this morning it's only showing white pages with ReferenceError: $ is not defined and only the admin part is working.

Greetings,

Benjamin

You can go into the admin and turn JS compression off.  Then clear /cache and /cache_public.

Did you add a new JS lately that could be interfering?