file-roller delete file in certain circumstances

I have been able to reproduce the bug. Similarly to Miguel, I did the following :

1) I created a folder, in which I created a few text files. I named one of them example.zip.
2) I then selectionned the files I created, right-clicked on them
  and chosed "Créer une archive" ("Create an archive") in the drop-down menu
3) In the dialog popping up, I selected the .zip extension and filled in "example" as name
4) I then clicked on "Créer" ("Create").
5) A dialog popped up : "L'archive existe déjà. Voulez-vous l'écraser ?"
  ("The archive exists already. Do you want to overwrite it ?). I clicked on "Overwrite".
6) After the first dialog disappeared, another appeared :
    "Une erreur s'est produite durant l'ajout de fichiers à l'archive."
    "Vous ne pouvez pas ajouter une archive dans elle-même."
  Meaning :
    "An error occured during the addition of files to the archive"
    "You can not add an archive to itself"
  I then clicked on "Valider" ("Ok"), which was the only button available.
After this, the file example.zip that was previously in the folder had disappeared.

I added in French the messages I got when reproducing the bug in case my translation into
English is wrong.

Also, my version of Ubuntu is 8.04, and the zip package installed on my computer is 2.32-1.

I confirmed the bug.

Output of "uname -a" :
Linux Belzebuth 2.6.24-16-generic #1 SMP Thu Apr 10 13:23:42 UTC 2008 i686 GNU/Linux

Output of "apt-cache show zip" attached as "zip-version" file.

I have been able to reproduce the bug.

After a bit more looking around, it seems that it is the "file-roller" package which has the problem.

To determine this, I executed the following command in the console when reproducing the bug :
xprop | grep WM_CLASS

I then clicked on the dialogs, which gave me this output :
WM_CLASS(STRING) = "file-roller", "File-roller"

Also, I tried to reproduce the bug using the "zip" program in a console, and I could not reproduce
the bug. Here is what I tried to reproduce the bug at the command line :

------------------------------------------
yves@Belzebuth:~/Music$ ls -l
total 8
-rw-r--r-- 1 yves yves 18 2008-06-05 13:36 auie
-rw-r--r-- 1 yves yves 0 2008-06-05 13:36 auie~
-rw-r--r-- 1 yves yves 20 2008-06-05 13:36 eiau
-rw-r--r-- 1 yves yves 0 2008-06-05 13:36 eiau~
yves@Belzebuth:~/Music$ zip example.zip eiau auie
  adding: eiau (stored 0%)
  adding: auie (stored 0%)
yves@Belzebuth:~/Music$ zip example.zip eiau auie example.zip
updating: eiau (stored 0%)
updating: auie (stored 0%)
yves@Belzebuth:~/Music$ rm example.zip
yves@Belzebuth:~/Music$ touch example.zip
yves@Belzebuth:~/Music$ zip example.zip eiau auie example.zip
 zip warning: missing end signature--probably not a zip file (did you
 zip warning: remember to use binary mode when you transferred it?)

zip error: Zip file structure invalid (example.zip)
yves@Belzebuth:~/Music$
------------------------------------------

Thanks for your report, may you tell us some steps in order to reproduce the bug with file-roller? thanks.

Um, I don't understand ... you have a full step-by-step explanation on how to reproduce the bug. Is there anything missing ? What other information do you need ?

Also, to clear up possible confusions, my last post was only explaining how I deduced that the bug is affecting file-roller instead of the zip package.

the description was unclear, I've updated it to reflect the file-roller behavior.

I've sent this upstream at http://bugzilla.gnome.org/show_bug.cgi?id=536834