Profile: Contact deletes with error

Preconditins:
1. User logged in http://qa.jtalks.org/jcommune/
2. Profile page is opened for edit
3. In contact's list there is Skype.

Steps to reproduce:
1. Click red cross opposite Skype in contacts list (1.jpg)
2. Click OK in appears window for confirmation delete contact
3. Click 'Save changes' button

Actual result: Window with error message appears (2.jpg)
Expected result: Contact should be deleting without appearing window about error

Note: In fact, after save changes, this contact was delete.