Mediawiki 1.26wmf17. If you use the break=no parameter the vertical and horizontal alignment of the inputfield and the buttons is weird. The weirdness depends on the type of the inputbox. Some use a blank between the inputbox and the button, some not. In some types for example "type=search" the vertical alignment of the buttons is a few pixels below that of the inputfield. In "type=search2" the fields are left aligned on the page, in all other types the fields are centered. For me type=search2 has the best looking vertical alignment but should be changed to centered alignment like the other types. In all other types the alignments should use that of type=search2. A testpage could be found here:
https://de.wiktionary.org/wiki/Benutzer:Formatierer/TestInputbox