I want to say your temp files are broken, if you know where they are on a mac go and find them and delete the folders for minecraft.net/www.minecraft.net
I believe this is a common issue, i have it as-well but there is no resolve and indev will never be updated again as notch is working on Infdev to be the new Indev.
0
0
0
0
Use a program called NBT Edit (Search.) to edit your health to 0 and then respawn.
0
0
0
0
Usually i had a square and a circle of water surround the dirt inside with glass roof bringing sunlight into the area.
0
0
0
0
0
0
Either this or the link you gave them didn't work properly. Try having them put &override at the end of your external url
0