I've had this problem since day one of bird watching being released. A blank page loads so I cannot play the game, I'm running Safari Version 8.0.6 and have tried it on both my iMac and Macbook Pro. Here's the screen I'm getting:

[edit]I've also just tried it on Firefox and Chrome and still no luck. Adblock is the only add-on installed and it is disabled on all these browsers.
probably a daft question, but are you using any customCSS, that has anything like
.ui.grid > .ten.wide.column {display:none;}
in there? (as that would stop bird watching from showing up)

Blimey you cracked it! I had the following lines of code in my CSS to put frames around floating items, looks like that was the thing stopping it from showing, the code was:
.floating_item {
position:absolute!important;
top:5px!important;
left:5px!important;
border:4px solid;
border-color:!important;}
div.ui.segment.basic {display:none;}
Thank you so much!
you're welcome! :D
You can still use the first bit of the floating items code (I've got mine set to have a border and appear at a set place on the screen), just leave out the
div.ui.segment.basic {display:none;}
;)
