We started getting emails "Warning: Page Views Are at 93% of Your Limit", which is 93% of 500,000 page views since summer '14 release. This is impossible as most if not all our page views are coming from authenticated users, see the Help Article on this below.

https://help.salesforce.com/HTViewHelpDoc?id=sites_limits.htm&language=en_US

It says:

"A page view is a request from a non-authenticated site user to load a page associated with one of the sites within your Force.com domain or custom domain. Requests from authenticated portal users are not counted as page views."

We have a polling action that starts after users log in, users are using Authenticated Website user license. Just the past 2 months we started receiving this "warning", it wasn't happening before, must be the Summer '14 release.

We have a polling action that triggers Apex/Ajax callout every 10 seconds.

...
setInterval(function(){checkForNewMessages();},10000);
...
Visualforce.remoting.Manager.invokeAction(
'{!$RemoteAction.SiteUserTemplateController.checkForNewMessages}',
...

This call is counted toward the Page Views Limit, which It Shouldn't Because User is Authenticated.

Any way to serve manifest files from SFDC, static resource, vf page, other with mime type 'text/cache-manifest'?

One of the largest pain points with inline visualforce pages is that the height is static even though the content may be dynamic. The response from salesforce.com has been:

"As for iframes, they do not provide a "dynamic height" capability natively. If the domain of the page that served the iframe is the same as that of the page that is embedded in the iframe then you can write script that resizes the frame to fit the contents but this is something that is not possible for Visualforce pages since they are now served from force.com."

Well....I tried this and it now works. I added this inline page to a layout and in the settings set the height to 15px. Once loaded it dynamically adjusts the height based on the content. So far I have tested with FF3 and IE6, works on both.

<apex:page standardcontroller="Opportunity">
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<script type="text/javascript">
resizeIframe();
function resizeIframe() {
var me = window.name;

if (me){
var iframes = parent.document.getElementsByName(me);
if (iframes && iframes.length == 1) {
var height = document.body.scrollHeight;
iframes[0].style.height = height + "px";
}
}
}
</script>
</apex:page>