9926 - Search bar disabled/read only

Hello,

I've installed the latest TP this evening, and everything's working great except the search box.

I'm in the UK, so I understand I don't get Cortana yet, but the search box itself is disabled, set to read only - dark grey background with pale grey foreground - when I click it, I can select the text but not type anything.

I can't change any settings from within the Settings - Search and Cortana section either, clicking on "Customise Cortana and search settings" does absolutely nothing. I'm signed into a MS account.

If anyone has experienced this problem, and knows of ways to get around it, please let me know, it would be much appreciated! Thanks.