I try creating some various filter to add tags mails. After create tags, and connect it the filter dialog to criteria, and click "ok" or "apply", bring a dialog this message (attached picture 2) :

Tag was "".
Filter tag is missing. ....

Ok, I select all tag again (the dialog is repeating over all filter when add tag), and appears to be OK. But when open the Filter settings, and click Ok or Apply, bring the previous dialog again. (picture 1) The combo box with the existing filters is resetted.

Reproducible: Always

Steps to Reproduce:
1. Settings -> Configure KMail -> Appearance -> Message Tags, and create any tag
2. Settings -> Configure filters, and create a filter. Add a criteria, and select "Add tag" action the list. Select one of the list of tags. 
3. Click "Ok" or "Apply" The dialog bring it on, select tag again, and OK.
4. Open filter settings again, select the filter in the left side, and the previous selected filter is not selected.
5. Click "Ok" or "Apply", and the dialog open....
Actual Results:  
Lost the settings, and the tags is not applied the mails.

Expected Results:  
Keep the settings and apply the tags.

uname -a : Linux 3.11.4-201.fc19.x86_64 #1 SMP Thu Oct 10 14:11:18 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

Qt: 4.8.5
KDE Development Platform: 4.11.2
KDE Daemon: 4.11.2