#992938 by Dave Reid. Fix the switch user block should use format_username(), which requires full user objects.

#970688 by Mark Trapp, salvis: Use error_reporting() in the backtrace_error_handler() to allow setting the desired error flags in settings.php or php.ini.

915620 by salvis. Fix "This form is outdated. Reload the page and try again." error in Switch User function

#568758 by Mark Trapp | donquixote: Added Devel backtraces should follow Drupal core's handling of E_DEPRECATED.

Attempt to support the PEAR version of Firephp. Untested, but does not break downloaded version (thats tested).

#376824 by moshe weitzman. Query log displays dreaded Fatal error: Exception thrown without a stack frame in Unknown on line 0 on Views pages

use drupal_var_export() instead of var_dump() during our debugging functions. It is more readable. krumo users don't necessarily see much of this.