Created attachment 2455 
Bug-buddy report for crash

I see it only with some files, like this:
http://sourceforge.net/projects/klavaro/files/klavaro/klavaro-1.2.1.tar.bz2/download

To reproduce:
- Open above file
- Change Navigation style to internal
- Enter into a directory in the archive, try to click ".." to navigate to parent dir
- Crash 

This happens on current SVN trunk.
Terminal output:

$ squeeze /tmp/klavaro-1.2.1.tar.bz2 

(squeeze:6210): atk-bridge-WARNING **: AT_SPI_REGISTRY was not started at session startup.

(squeeze:6210): atk-bridge-WARNING **: IOR not set.

(squeeze:6210): atk-bridge-WARNING **: Could not locate registry
** (squeeze:6210): DEBUG: application/zip supported

** (squeeze:6210): DEBUG: application/x-zip supported

** (squeeze:6210): DEBUG: application/x-zip supported

** (squeeze:6210): DEBUG: application/x-tar supported

** (squeeze:6210): DEBUG: application/x-tarz not supported

** (squeeze:6210): DEBUG: application/x-tzo not supported

** (squeeze:6210): DEBUG: application/x-compressed-tar supported

** (squeeze:6210): DEBUG: application/x-bzip-compressed-tar supported

** (squeeze:6210): DEBUG: command: tar
** (squeeze:6210): DEBUG: arg: '-tvvf'
** (squeeze:6210): DEBUG: arg: '/tmp/klavaro-1.2.1.tar.bz2'
** (squeeze:6210): DEBUG: lsq_archive_refreshed
** (squeeze:6210): DEBUG: cb_sq_archive_store_archive_refreshed

(bug-buddy:6214): atk-bridge-WARNING **: AT_SPI_REGISTRY was not started at session startup.

(bug-buddy:6214): atk-bridge-WARNING **: IOR not set.

(bug-buddy:6214): atk-bridge-WARNING **: Could not locate registry

(bug-buddy:6214): Gtk-CRITICAL **: gtk_text_buffer_emit_insert: assertion `g_utf8_validate (text, len, NULL)' failed