I was able to replicate this without bukkit and in single player. This can't be replicated in pure vanilla, but it also addresses that some NBT data isn't being sent to the client, which is an issue.
To change the fuse length, you can use MCEdit to create a schematic where an NBT editor can edit the entity then and replaced back into the map.
In vanilla minecraft the fuse length is redundant but to map makers, or to a future feature this is potentially a bad issue.
MC-2667
TNT now has an NBT tag defining the fuse length.
I was able to replicate this without bukkit and in single player. This can't be replicated in pure vanilla, but it also addresses that some NBT data isn't being sent to the client, which is an issue.
To change the fuse length, you can use MCEdit to create a schematic where an NBT editor can edit the entity then and replaced back into the map.
In vanilla minecraft the fuse length is redundant but to map makers, or to a future feature this is potentially a bad issue.
Confirmed for 64 bit Windows 7 as well.
Window size and fullscreen do not fix it.