E-publish: unable to delete edition or publication

Not an issue. I was able to delete edition or publication easily. I've been using this module for long.

May be write your steps in detail so that i can try reproduce this.

I cannot remove an edition or publication from e-publish, but this bug is only showing up when localization is active (in my case: Dutch).

1. To repeat this bug I used a clean install of Drupal 5.1
2. Install E-Publish 5.x-1.x-dev module in sites/all/modules/, following instructions in INSTALL.txt
3. Go to admin/epublish and add a publication and a few editions in E-publish. Delete an edition. All works fine.
4. Add a language in admin/settings/locale/language/add (in my case: Dutch). Set new language to 'enabled'.
5. Go to admin/epublish, delete an edition. Still no problem.
6. Import language file in admin/settings/locale/language/import.
7. Go back to admin/epublish, try to delete an edition. There is it: the screen refreshes (admin/epublish/edit/edition/xx), but the edition is not deleted. No error warning.
8. Go to admin/settings/locale and enable English as the default again: the bug is gone and you are able to delete editions in e-publish again.

The same applies for removing publications. To check if this bug depends on the Dutch translation (nl.po file), in localization I added French and imported the French language file (fr.po). When enabled, it produced the same bug.

Thanks for the details. Please download the latest version of epublish.module for 5.x.