Description of problem:
The 'yomigana' input fields in vcard editing window are emptied when users are
trying to save that.

Version-Release number of selected component (if applicable):
1.5.0.10 (20070302)
thunderbird-1.5.0.10-1.el5

How reproducible:
Always.

Steps to Reproduce:
0. Ensures Japanese support and thunderbird are installed.
1. Open virtual terminal in gnome: Alt-F2 > `gnome-terminal` > Enter.
2. Start thunderbird in locale Japanese: `LANG=ja_JP.UTF-8 thunderbird`.
3. Open vCard editing window: '編集' > 'アカウント設定' > (select an account, or
create a new one) > (click on account name) > 'vCardを編集'.
4. Input some English typing into two 'よみがな' input fields > 'OK'.
5. Reopen vCard editing window: 'vCardを編集'.
  
Actual results:
Data in 'yomigana' (よみがな) should be updated.

Expected results:
'yomigana' (よみがな) fields are empty.

Additional info: