Cant name tile category as "Keytile"

[SmartBoy16]

I just figued this a while ago, but apparantly when a tile category is named "Keytile" you cant find the category in the rules editor, but "Key tile" works just fine!

[bluemonkmn]

I bet the name is not the significant difference here, and if you tried the same thing again you'd get different results.  I think there was some other variable like when the project was compiled or when the sprite/plan editor was loaded, or when you selected a rule function.