Unable to Create New Card if Rank is Edited/Set in German(Germany) Language.

Steps to reproduce:

In GreenHopper

1. Change to locale to German(Germany).
2. Click at Create Card, edit Rank field and click on create.
3. Error "Rank: Failed to set field" will be throw, Create card work fine if rank is not edited (last).

In JIRA

1. Create a new issue
2. Edit the Rank field and save.
3. Error like will be throw.

   '1.3125E7' is an invalid number

In JIRA

1. Edit an issue
2. Change Rank field and save
3. Error like will be throw.

   '1.3125E7' is an invalid number

Only happen in:

1. JIRA 4.2 + GreenHopper 5.3 (no problem in JIRA 4.1.2 + GreenHopper 5.2.4).
2. German (Germany), no problem in German (Switzerland).