After upgrade to 4.5.6 I can´t use some tabs/buttons.

[Mich___]

Hi all,
I just upgraded CiviCRM and Wordpress and
now some tabs/buttons won´t open or expand

1) For example the more tab in campaign- petitions: protocol attached.
 
It seems to be a javascript problem. Where would I start?

Any hints?

Best wishes, Michael

[Coleman Watts]

Yes it's a javascript crash. Some steps to resolve:

1) Clear all caches.
2) Ensure your base url settings are properly configured - test this by viewing page source and make sure the script named something like *civicrm/ajax/l10n-js* is actually loading
3) Check for any incompatible extensions or customizations. If you are using tpl overrides or custom code that overrides CiviCRM, try disabling it.

[Mich___]

Thank you very much for this!

I disabled all plugins and things work again. I now just have to
find the plugin that causes the trouble.

Michael*