User blog comment:TOR/MediaWiki Upgrade/@comment-174.126.210.190-20120703153903

mw 1.19 is still highly resource intensive in IE9 on any Wikia. Processor use reported above 50% for up to 45 seconds upon page load, frequently spiking above 90%. Rare spikes in reported processor use pursuant to initial symptoms if page is left open for long durations. Can induce safety shutdown due to overheat within five pages if loaded consecutively with minimal delay.

In essence, mw 1.19 shares the most troublesome technical issue in IE as was common to Wikia sites running mw 1.16. Cause is personally unknown, possibility of perpetuation across browsers is personally unknown. Recommendation: Cooperative investigation with MediaWiki staff.

It is interesting to note that the MediaWiki website, like Wikipedia, continues to use mw 1.12, which displays no hint of the above issue.

Sincere apologies if this is not where you would prefer that such reports be delivered.