Go to your C:\Feralheart\Media\Terrains folder. In that folder, you should find the folder 'temp.' Open it and click on 'tempObjects'. Press CTRL-A and then press Delete. Hover your cursor over the buttom 'File' and click 'Save.' DO NOT CLICK 'SAVE AS.'[/u]. If you have water / gates in the map, do the same with the tempWater and tempGates. Open FH+, load the map, and click 'Test'. Exit out and see if any objects appear.
Well, that works for me. Dunno about others.