Unfortunately the move to the new domain has not been without its troubles, and with me in various cities of 2 different countries over the last 2 weeks (still on holiday!) hasn't made the move and subsequant problems any easier to overcome. Nevertheless, I think everything should be working as expected now, and I apologise for any inconvenience caused.
If you are still experiencing any problems, please contact me.
On another note, I have released JCE Admin Component 1.5.0 RC2, which moves the Control Panel buttons and News Feed section to a set of modules. Further modules will also be developed. This should fix the 'fatal error' issues experienced in RC1.