What I expected to happened: Right clicking on the TNT with a flint and steel would ignite it. Shooting the TNT would ignite it.
What actually happened: Nothing (with flint and steel). The cart broke (Flame bow)
Linked issues
Comments 3
Cause the minecart is protecting it?
I'm going to go with, the code was giving them problem, or to force the player to use the activator rails... also, I'm sure they were thinking if a player wanted to light it with flint they'd just use regular tnt, and not to many people were going to try and hit it with and arrow (fire).
http://www.minecraftwiki.net/wiki/Minecart_with_TNT