Would there be anything bad about including http://commons.wikimedia.org/wiki/MediaWiki:ResizeGalleries.js to the core code?
It's impoprted from http://commons.wikimedia.org/wiki/MediaWiki:ResizeGalleries.js
It adjusts the ammount of galleryboxes to teh width of the clients window width.
Made a quick test in IE with disabled JS. It will simply fall back to the default.
Version: unspecified
Severity: enhancement