I've checked them all, it's almost like there is a pixel of space between each new sprite i put down.
I am putting them down as sprites (so i can set collision polygons)
But before this, i was putting them down as Background Tiles, but i still had the same problem. Creases in between each block i put down.
if i put a block down and activate the grid and make it bigger, it's fine, no spaces in between blocks.. only when i put a new Sprite or Tole down it doesn't completely fit seamlessly.
Is this a feature maybe just to let you know they are seperate blocks.. i'm really not sure.
What is the size of the blocks in the editor and in the layout?
Look at the sizes because those sometimes jump around and may have to be reset.
If you are using set to grid to set them that could be the problem.
If you can post a capx I will look at your layout.