Put the summary of the bug you're having here:

Last Snapshot Version I had on my computer was 13w24a.
In that Snapshot I successfully converted two Texturepacks into Resourcepacks and logged off from my world while still having one of the converted texturepacks/resourcepacks chosen as my Minecraft texturepack.

Now I just wanted to install 13w25c, Launcher attempts to install that version, I see the Minecraft Gamewindow popping up that has an INDIVIDUAL LOADING SCREEN because of the texturepack ("MOJANG and Mikeyto1o"), then the Gamewindow crashes, and the Launcher tells me that the game has crashed.

The texturepack I converted was Modern HD Pack by Mikeyto1o, MC-version 1.5.

I attached 3 crash reports as well as the original Texturepack, as well as the converted texturepack/resource pack, repacked in a ZIP, to this report.

What I expected to happen was...:
New Snapshot/Minecraft version would be installed without crash, although I still had not the default texturepack chosen when I logged off my Snapshot world.

What actually happened was...:
See above.

Steps to Reproduce:
1. Have a 1.5 texturepack converted into a resourcepack
2. Login into 13w24a
3. Chose the converted texturepack/resourcepack as your texturepack in the game
4. Log out.
5. Close Launcher.
6. Start Launcher.
7. Make a new Profile for 13w25c.
8. Chose 13w25c in the Version Dropdown Menue
9. Click "Play" / try to let it install the new Snapshot.
10. => Loading Screen will vanish, Game crashes.
11. => Snapshot is still not installed, it still says "Will be installed" below the Version-Dropdownmenue.

• I don't know if it only happens with this specific texturepack, hence why I uploaded it here.

I don't know if it has anything to do with my old Win XP computer -
I can try to reproduce it on my Win7 laptop, if needed.

Kind regards,
Meri

EDIT: I removed the converted texturepacks/resourcepacks out of the resourcepacks folder - now Minecraftgets launched without any problems. So the reason must be really this converted texturepack or the fact that I logged off with it from my world, while in 13w25a I suppose .