Crash because of Resource Pack/font in converted Texture Pack

I converted my own Texture Pack with the TextureEnder jar-File, copied the converted Texture Pack to the Resources-Pack folder, started the game and chose the Resource Pack. Then the game crashed.

EDIT: I restarted the game and it started with the resource pack enabled. The font was screwed up that is why i deleted the font folder in my texture pack. I converted it again to a resource pack and the resource pack worked.

What I expected to happen was the game choosing the converted Texture Pack.

What actually happened was that the game crashed.

Steps to Reproduce:
1. Get a 1.5.2 Texture Pack
2. Convert it with TextureEnder.jar
3. Copy it to the needed Folder, start the game and choose the converted Texture pack