--- a/PresetMaps.wiki	Mon May 09 21:59:21 2011 +0000
+++ b/PresetMaps.wiki	Fri May 13 00:17:14 2011 +0000
@@ -37,8 +37,8 @@
 === map.cfg ===
 Configuration file.
 
-  * First line is max. number of hedgehogs supported
-  * Second line is the name of the [Theme] used by the map (for background and clouds, flakes, water, etc)
+  * First line is the name of the [Theme] used by the map (for background and clouds, flakes, water, etc)
+  * Second line is max. number of hedgehogs supported. If the second line is not provided, it is assumed to be 18
 
 
 
@@ -74,6 +74,9 @@
 
 == Image format ==
   * PNG, 8-bit/color RGBA (so 32 bit)
+  * Gamma correction and colour profiles should not be applied, in order to ensure the map is loaded identically on OSX as it is on other operating systems by SDL.  To ensure this happens, please run:
+pngcrush -rem gAMA -rem cHRM -rem iCCP -rem sRGB old/map.png new/map.png
+or be sure your image editing software has these options disabled.
 
 ----
 = Editing software recommendations =