1) Without getting too technical, the forum servers have been upgraded over the past day. You may see the forum not available/showing error page in on and off manner for the next 24-48 hours. This is a standard resetting process for a server change.
The updates will be completed within 48 hours. The new servers will bring faster loading speed and more reliable support. This will future proof the forum capacity to handle increase load while delivering reliable uptime.
2) Alternative themes have been added. This was suggested by members and currently there are 3 new themes that you can choose over the default theme. More themes will be added soon.
To change your theme, go to
profile > modify profile > looks and layout > current theme change > use this theme
Here's a preview of the new themes display
Icecube 
Skyline
DSV4
