Description:
If you try to open a file or create a new one ardour segfaults after klicking "new" or "open".

Additional info:
* package version(s)
2.3.1-1
* config and/or log files etc.

error :
[code]
[johannes@ThinkpadT40Johannes ardour2]$ ardour2
WARNING: Your system has a limit for maximum amount of locked memory!
This might cause Ardour to run out of memory before your system runs out of memory. You can view the memory limit with 'ulimit -l', and it is normally controlled by /etc/security/limits.conf
Ardour/GTK 2.3
(built using 3029 and GCC version 4.2.3)
Copyright (C) 1999-2007 Paul Davis
Some portions Copyright (C) Steve Harris, Ari Johnson, Brett Viren, Joel Baker

Ardour comes with ABSOLUTELY NO WARRANTY
not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
This is free software, and you are welcome to redistribute it
under certain conditions; see the source for copying conditions.
loading default ui configuration file /etc/ardour2/ardour2_ui_default.conf
loading user ui configuration file /home/johannes/.ardour2/ardour2_ui.conf
Loading ui configuration file /etc/ardour2/ardour2_ui_dark.rc
theme_init() called from internal clearlooks engine
loading system configuration file /etc/ardour2/ardour_system.rc
loading user configuration file /home/johannes/.ardour2/ardour.rc
ardour: [INFO]: No H/W specific optimizations in use
ardour: [INFO]: looking for control protocols in /home/johannes/.ardour2/surfaces/:/usr/lib/ardour2/surfaces/
ardour: [INFO]: Control protocol Tranzport not usable
powermate: Opening of powermate failed - No such file or directory
ardour: [INFO]: Control protocol powermate not usable
ardour: [INFO]: Control surface protocol discovered: "Generic MIDI"
ardour: [INFO]: Control surface protocol discovered: "Mackie"
Segmentation fault
[/code]

Steps to reproduce:
Start ardour
enter a new name
klick "new"