title: Facebook App Not Displayed Insecure Content Message In Chrome
body: <p>I've been trying to get to bottom of this problem for a few hours but I can't seem to fix it, I've seen other questions similar to this and tried to use those to implement a fix for my problem but to no avail.</p>
  
  <p>I've built a facebook contest canvas app which displays fine independantely but when I link it to a facebook page (as a link to a new contest) chrome no longer displays is and gives the following warning:</p>
  
  <p>The page at '<a href="https://www.facebook.com/contest/app_xxxxxxxx" rel="nofollow">https://www.facebook.com/contest/app_xxxxxxxx</a>' was loaded over HTTPS, but ran insecure content from '<a href="http://mydomain.com/" rel="nofollow">http://mydomain.com/</a>': this content should also be loaded over HTTPS.</p>
  
  <p>I've learned partly by trawling this site that the chrome security is fussier, and the app loads correctly, without errors in FireFox and IE but I can't find any resources that are loaded from a non https source.</p>
  
  <p>I have been through with firebug checking in the net tab and checked that all of the loaded resources are using https (the png images, the jpg images, the css files and the jquery js files which are all hosted on the same server that has the certificate), I have even tried hosting the transitional dtd doc itself but nothing seems to make the warning go away and the app display correctly.</p>
  
  <p>In the other similar questions it seems that there are either resources sourced from non-https sources or there are ssl switches used in the javascript library for facebook passed before the fb init.</p>
  
  <p>The problem is that I am using only the php sdk not the js one (although I am using version 1.9 of jquery, hosted on my server) and I could find no similar ssl specific settings there.</p>
  
  <p>If someone could give me a tip about how I could investigate further, what I might be missing or is familiar with this issue I'd be interested to hear about it.</p>
  
  <p>Thanks a lot.</p>
  
  <p>David</p>