To fix the problem witrh "purge", some admin can copy the MediaWiki:Gadget-UTCLiveClock.js and replace rows n° 15, 16 and 17: From
var hh = now.getUTCHours(); var mm = now.getUTCMinutes(); var ss = now.getUTCSeconds();
To
var hh = now.getHours(); var mm = now.getMinutes(); var ss = now.getSeconds();
Thanks.