So first off, the post from the dev team blog

Only a few weeks after the 4.3.1 untether created by @i0n1c was released, Apple pushed out firmware 4.3.2. Thankfully, it appears Apple didn’t have a chance to fix the hole used by @i0n1c’s untether, so he ported his code over to 4.3.2’s kernel.  Today’s redsn0w has been updated to include it.

The 4.3.2 untether works on all devices that actually support 4.3.2 except for the iPad2:

• iPhone3GS
• iPhone4 (GSM)
• iPod touch 3G
• iPod touch 4G
• iPad1

redsn0w 0.9.6rc14:

• OS X redsn0w
• Windows redsn0w

Update #2: redsn0w rc14 includes the fixed i4 untether from @i0n1c.  You can re-run redsn0w rc14 right over the tethered rc13b to transform the i4 JB into an untethered one.

Now read the comments.  Although it seems the bugs have been worked out though.