Yea, Word 2003 I think it was always wanted you to have 2 spaces, but the new ones no longer care.  Certain fonts I've discovered are also designed to make it look more appealing with only one space where it will still be a good break.  There are other fonts still used, however, that make it hard to tell the end of a sentence is coming if there is only one space.

Actually, Word doesn't correct 2 spaces, and I believe through Word 2003 (Word 2007 is no longer this way), it actually put a squiggly line if you only had one space after a period.

Hey I use 2 spaces between sentences!  And I have been taught that way from the first time I could write until 12th grade.

But that's what I'm saying: it is wrong. People should write however they like, if you want to use 2 spaces, do it. if u want 2 type liek dis, do it. But it's both formally wrong. Check out any scientific or literary format and you'll see only 1 space is accepted.

I kinda think it looks better.  And it's funny that Word actually called one space wrong as late as the 2003 one.

No it didn't. At least none of the versions of Word 2003 I've used. I always use a single space and I have never had Word correct that. It doesn't really bother me if I notice it unless I am for example correcting a friend's work, as I have a friend who does this all the time (it's not even consistent, usually she uses two, but on occasion she will add three and even four).

I've never really heard of it.  But it really sounds annoying.  Furthermore i would understand you being so annoyed by it and i can see where your frustration can come from.  

I was taught two space sentences I've got to admit. Never really thought about it though. Don't know if i usually do it or not, using 1 space now because I'm thinking about it.

self-important grammar nazi's telling people how to write and expecting someone to care.  2 space is not a way of writing.  It's a way of life.