Question on iPhone 4 and Limera1n Exploit

Hi all,

I understand that the iPhone 4's saving grace is a boot loader exploit, and since I've had my iPhone 4 since release day, I've been bueno in terms of JBing my phone.

However, for the past six or so months my home button has been acting VERY finicky. I'm talking serious issues. I want to get it replaced when the 4.3.1 JB comes out, but I'm worried that the Limera1n exploit will have been patched in a new phone.

Should I take the risk? Is there any evidence of this happening?

(Edit: Does it matter what boot loader I have with the 4.3.1 untether release so close?)