Thanks Allejuppa, deleting the style.qss file worked a charm. 

I've just installed the new CLAM Wallet on MacOSX Yosemite.  I loaded the application and it started to download the blockchain.  I closed the client and then I was able to copy across the blockchain and wallet from my Windows machine.  Files were copied from Windows (%appdata%\Clam) to MacOSX (~/Library/Application Support/Clam).  I restarted the client after the copy was complete and the blockchain and wallet were available and in sync.

The only thing I had to change in the new client was to stop using the black visual theme (under Options => Display) so that I could see the mouseover text for the locked/encrypted, staking, network connections, up to date icons (in the bottom left of the window).  When using the black visual theme, the transparency was hard to read.  I tried it against my dark wallpaper/background and against a light background but it didn't really make a difference.  I do like the black theme but I can't use it atm.

Totally have to agree with you there.... and all the stars in the border?  Pfffttt...

I'm able to send PMs now so I have sent Digger one.  I can't imagine that s/he will be able to do anything but I thought I should try.

Edit: I sent Digger a PM and logged back into the site.  The payout address was unlocked so I set it back to my original address and relocked it.  Hopefully this is all good now.

I just checked my account and it looks like my payout address has been changed and locked (it's now 6xEjXTc9cSJzDatsBD63Z1WnT8GjLKP8au which is not mine).  My payout address should be: 6xuUB9KPQN8uDRZ5kuAaHjCNy4RyPu6pTK

I can't work out how to contact Digger, the site admin, because there is no email address for him and I can't send private messages on the board yet.  If anyone can assist then that would be great.

It's a little disappointing.  I think I had just got enough coins for the payout to work and then this happened.