Thread:Project:Support desk/Scripts in Common.js doesn't load correctly in 1.19/reply

A very strange issue indeed. I must say I haven't experienced anything like this on any mediawiki.

Could you file a bug on (what? ) about this?

I'd recommend filing it under component "MediaWiki -> ResourceLoader". Be sure to set the correct version (1.19.0) and if possible add other information you have on of your wiki.