I'm currently putting this project on a halt so I'm not replying as often as I could. Can you just double check the options.ini contains "block_limit" and it's set to 9999?
Viewing post in Update 0.6.5
{"frames_per_second":60,
"block_limit":9999,
"physics_quality":3,
"music_volume":-25.0,
"sfx_volume":5.0,
"show_frames_per_second":true,
"show_block_counter":true,
"mouse_sensitivity":9,
"show_vignette":false,
"show_motion_blur":false,
"show_AA":false,
"show_AO":false,
"texture_pack":"Default",
"experimental_physics":false}