On an new installation (ezflow or ezwebin) using dev environment will show an 404 error in a popup window

An error occurred while loading the web debug toolbar (404: Not Found).
Do you want to open the profiler?

In the ezpublish debug info i have

Error: index 	Oct 14 2013 11:14:44
Undefined module: _profiler
Error: error/view.php 	Oct 14 2013 11:14:44
Error ocurred using URI: /_profiler/deae6e

To reproduce the issue:

1. Download the ezpublish-5.2 tarball or get the git Master version for ezp
2. Install ezpublish using setup wizard
3. Download the ezflow / ezwebin packages from packages.ez.no
4. Activate dev mode in rewrite rules