By default:
- Links are underlined only on hover for vector, monobook, etc
- Links are always underlined for legacy skins like cologneblue, standard
The underline option of Special:Preferences only works for the legacy skins (default is browser standard which is afaik nearly always "underlined").
Solutions:
- If this is the intended behaviour, it should be mentioned on Special:Preferences that it only works for those skins
- The option can be extended to work on all skins
- The option can be removed as it is trivial and can be done by simple CSS
(In general, more clean-up is needed for preferences & skins.)
Version: 1.20.x
Severity: normal