I have updated the game to version 0.7.0. If you still see the problem If you do, can duplicate this on another machine or send me how you achieved it?
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}