Looks like latest build, deletion of ~/.BitsharesXTS/chain and restart got me onto main blockchain again.
>>> get_info
{
"blockchain_head_block_num": 11740,
"blockchain_head_block_time": "20140616T172130",
"blockchain_head_block_time_rel": "7 seconds old",
"blockchain_confirmation_requirement": 212,
"blockchain_average_delegate_participation": 66.076294277929151,
"network_num_connections": 7,