Question : RRAS Enable Fragmentation Checking

I should point out up-front that I'm asking this question in order to be "ultra careful" about what I'm doing.  I'm "locking down" a remote 2003R2 server via RDP, and I'm more than a little paranoid about doing something that'll kill my RDP access.

There is an RRAS option "Enable Fragmentation Checking".  I've read Microsoft's stuff about what it does, and I understand what it's intended to do.  I'm configuring what'll be a publicly accessible web server, so this sounds like something I want enabled. However, Microsoft's description makes it sound like everybody would want this enabled automatically -- but yet it defaults to disabled.  The fact that it defaults to disabled, combined with the fact that Microsoft never really describes a use-case in which you wouldn't want it enabled, has me nervous.

My goal is to have the firewall disable all traffic except HTTP (80), HTTPS (443), SMTP (25), POP3 (110), RDP (3389) and PPTP (1723).  It's critical that I not do anything during my configuration that'll kill RDP.  If I do, I'll have to make an embarrassing call to the co-location house and ask them to fix my mistake.

Can anybody say (reasonably) definitively that "Enable fragment checking" will or will not (by itself) kill my RDP access?

Thanks!

Answer : RRAS Enable Fragmentation Checking

Okay, well... I guess nobody has any two cents worth to contribute to this one.