I take it back! It's working now - Simon, please explain the carousel issue. What happened, how do I avoid it, how can it help others, etc. What kind of memory issue? Thanks for helping.
As i said it was probably a memory issue and the LESS compile was not completing.
I didn't get as far as disabling plugins.
Being a shared host with 455 other sites all on the same IP there probably not a lot of ram to go around.
Even if the 'max' is set to 256M for your account, 455 x 256 is 113GB of ram, and cheap shared hosts do not put 100 gigs of ram in the server lol.