I have a lot of "minimum" parameters set to 0, except for final Desert and Forest region counts (14 and 5, respectively). Although I can start a world just fine, if I leave the "Design World with Parameters" screen for any reason, when I come back, the two parameters I mentioned have been reset to zero. This does NOT affect the init/world_gen.txt file; the two parameters remain at 14 and 5, although I can save over it and put it at zero. It appears that the problem lies in loading the parameters, not saving them.
Also, I set the "Minimum initial desert square count" to 5000, but that's still loading right, I think.
The parameters I'm using:
[WORLD_GEN]
[TITLE:DESERT / TREE]
[DIM:257:257]
[END_YEAR:1050]
[BEAST_END_YEAR:300:50]
[END_YEAR:1050]
[REVEAL_ALL_HISTORY:1]
[CULL_HISTORICAL_FIGURES:1]
[ELEVATION:1:400:800:800]
[RAINFALL:0:80:400:400]
[TEMPERATURE:1000:1000:400:400]
[DRAINAGE:0:40:400:400]
[VOLCANISM:100:100:400:400]
[SAVAGERY:0:100:400:400]
[ELEVATION_FREQUENCY:2:1:2:3:2:1]
[RAIN_FREQUENCY:2:5000:40:25:10:0]
[DRAINAGE_FREQUENCY:2:5000:60:0:0:0]
[TEMPERATURE_FREQUENCY:2:0:0:0:0:10000]
[SAVAGERY_FREQUENCY:3:1:10:100:1000:10000]
[VOLCANISM_FREQUENCY:2:0:0:0:0:10000]
[GOOD_SQ_COUNTS:50:500:1000]
[EVIL_SQ_COUNTS:300:3000:5000]
[PEAK_NUMBER_MIN:0]
[OCEAN_EDGE_MIN:0]
[VOLCANO_MIN:0]
[REGION_COUNTS:SWAMP:0:0:0]
[REGION_COUNTS:DESERT:0:0:14]
[REGION_COUNTS:FOREST:0:0:5]
[REGION_COUNTS:MOUNTAINS:0:0:0]
[REGION_COUNTS:OCEAN:0:0:0]
[REGION_COUNTS:GLACIER:0:0:0]
[REGION_COUNTS:TUNDRA:0:0:0]
[REGION_COUNTS:GRASSLAND:0:0:0]
[REGION_COUNTS:HILLS:0:0:0]
[EROSION_CYCLE_COUNT:250]
[RIVER_MINS:400:400]
[PERIODICALLY_ERODE_EXTREMES:0]
[OROGRAPHIC_PRECIPITATION:0]
[SUBREGION_MAX:2750]
[CAVE_MAX_SIZE:25]
[MOUNTAIN_CAVE_MIN:100]
[NON_MOUNTAIN_CAVE_MIN:200]
[ALL_CAVES_VISIBLE:1]
[TOTAL_CIV_NUMBER:20]
[TOTAL_CIV_POPULATION:20000]
[PLAYABLE_CIVILIZATION_REQUIRED:0]
[ELEVATION_RANGES:0:0:0]
[RAIN_RANGES:20000:0:300]
[DRAINAGE_RANGES:30000:0:0]
[SAVAGERY_RANGES:0:0:0]
[VOLCANISM_RANGES:0:0:0]