This is a plone-driven web site.
The page sometimes loads, but often hangs, with 9 of 10 items loaded.
the problem appears to be loading or executing
No problem here.
Pages at this (plone based) site still hang for me intermittently, and never hang on firefox
Looking in activity when the page hangs, all but 1 or two items will load, then a final element or two never loads.
Pressing re-load a few times in quick succession will usually but not always cause the page to load.
A related (I think) problem is that new content will not display, with old cached files being displayed, for instance if images are updated on the site, the old image will display until the page is force refreshed.
i understand this will be difficult to replicate - the pages work fine most times you load them, but every day (it is my home site) a page will gag