The Summary Fields extension is listed as working with 4.4 and 4.5. I am testing it on 4.6.8 and when I go to the Summary Fields tab for a contact that does have some Contribution records I see blankness. I have debug and backtrace on but am not seeing any errors as such. I haven't used this Extension before so it is possible I am just not using it correctly. Does anyone have this working on 4.6 or is it known to fail?
I attempted to use Summary Fields in a 4.6 Drupal installed CiviCRM and had an issue. I don't know any details of why, but it did load the Summary pages successfully, but took literally a couple of minutes for each page to load.
I am also holding back on upgrading a larger CiviCRM install at a non-profit purely because Summary Fields doesn't explicitly support the latest CiviCRM and my experience trying to install on this other site.