I get a redirect-loop warning (in google chrome) on the charts page as of early this morning (just now, 27th) when clicking either "Charts" link or the small chart on the main page, when GBP selected and shown as the currency. Not used the site for several days but I normally use the charts.
As above thankyou for pointing this out, my error!
As for the charts, we never set out to be a charting site, the API was always our focus. However, we would like to improve them a little. We don't have any intention of developing something like bitcoinwisdom, but what small/basic features are we missing that you would appreciate?