I have a Rails application, and when I have Javascript errors they are not showing in the Firebug console. I have 'Show javascript errors' and 'Show javascript warnings' selected.

When I insert javascript errors in a basic html file, the errors show as expected.

In the javascript of the Rails app, it only shows errors in rare cases. For example i can insert nonsense like:

dfghaefb;

and no error is shown in Firebug. But if i insert a space in there Firebug does show the error:

dfgh aefb;

Any ideas? This is driving me nuts.