The steps to reproduce the issue with me are exactly the ones described in the Bug Description.
Chat menu, add contact, account msn, in the identifier field I type the e-mail address of a friend, hit tab or click anywhere, his e-mail address gets replaced with mine after a couple of seconds.
I can confirm it also happens in 2.30.1 from PPA provided.
The steps to reproduce the issue with me are exactly the ones described in the Bug Description.
Chat menu, add contact, account msn, in the identifier field I type the e-mail address of a friend, hit tab or click anywhere, his e-mail address gets replaced with mine after a couple of seconds.
I can confirm it also happens in 2.30.1 from PPA provided.