Several users reported on [1] that they do not have a preview button (German "Vorschau") on the Commons upload page [2].
User:Chriusha does not have this button in both Windows XP and OS X (using IE and Safari).
[2] http://commons.wikimedia.org/w/index.php?title=Special:Upload&uselang=de
Version: 1.22.0
Severity: normal