This bug tracks the request to write and run a maintenance script on Wikimedia wikis to clean up the skin user preferences. Many skins no longer exist. Many users are storing unneeded values, causing the table to be bloated (cf. bug 52777).
As noted at bug 45179 comment 15, [[Wikipedia:Database reports/User preferences#Skin]] has been messy since it was created. It'd be great to see it cleaned up.
The database report currently looks something like this:
Skin Users
MediaWiki:Skinname- 7190151
MediaWiki:Skinname-0 54155
MediaWiki:Skinname-1 1763
MediaWiki:Skinname-2 3075
MediaWiki:Skinname-amethyst 1292
MediaWiki:Skinname-chick 32061
Cologne Blue 80642
Modern 69010
MonoBook 2185224
MediaWiki:Skinname-myskin 16285
Nostalgia 21256
MediaWiki:Skinname-on 16
MediaWiki:Skinname-simple 14245
MediaWiki:Skinname-standard 34502
Vector 166182
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**Version**: wmf-deployment
**Severity**: enhancement