In Word, the "curly" quotes are called "smart quotes" and the "straight" quotes are called (you guessed it) "straight quotes". Either can be used in Word, depending on your preference.

I'm guessing that "curly" quotes were developed probably to give a document that has them a little more flourish or more of a polished look than using straight quotes. But either one can be used.

Not sure why the new server would interpret one differently from the other. I'm guessing it only likes the straight quotes. Sometimes, in order to make all the double quotes in my Word document the same (and this is to make them all straight quotes), I'll do a global search-and-replace, with the double quote as both the searched for and replaced item. If you're copying and pasting from a Word document into this forum, you might want to consider doing that in order to make all your double quotes into straight quotes first.

CaT

If future generations are to remember us with gratitude rather than contempt, we must leave them more than the miracle of technology. We must leave them a glimpse of the world as it was in the beginning, not just after we got through with it.
- Lyndon Johnson, on signing the Wilderness Act into law (1964)