I have compiled the current SVN version of geany on an Ubuntu 9.10. First it worked, even when activating plugins, among them "treeview". But in the moment I have changed the "depth" to 2 geany crashed. Since then I only can start geany after removing the treeview-plugin from the geany.conf
Whenever I try to reacticate the plugin within a running geany or to start with the plugin in the conf file, the output of "geany -sv" says "Segmentation fault" and it crashes again.
The file browser on my Ubuntu is a standard nautilus, so I haven't touched the pre-defined command "nautilus %d" in the plugin configuration. Don't know if it is a browser-specific problem.