https://bugs.winehq.org/show_bug.cgi?id=37563
--- Comment #4 from Artem S. Tashkinov t.artem@mailcity.com --- (In reply to Guillaume Charifi from comment #3)
Login.cab is only related to login page. I can assert that it is not linked at all to this bug (it did not exist in an earlier version of Skype). By the way, by passing /legacylogin parameter to Skype, you get exactly the same problem, without deleting login.cab.
This switch is very hard to find and even harder to remember. ;-)
Deleting login.cab is a no-brainer )))