But there are cases where that's not true and the em-dash shows up as a "1/4".
If I were manually converting my Word docx to HTML I'd find all the italics and surround them with the "< i" tags and do a find/replace on the em-dash to change it to an mdash.
But if all I was doing was copying/pasting from Word to some place, such as the Wizard, how can I ensure it would display properly?
The screw-up seems tied to your version of WORD. If your text has received the all-clear from Lazeez, I wouldn't worry about it. If it was a problem, you could easily determine it by examining the specific references in your posted chapters. If the text doesn't contain any errors, then you should be safe.
Note: While my text is in the clear, and I'm currently using the PC version of WORD 2013, I'm not using the .docx format, so WORD may have changed the behavior in the newer format while leaving the older format as it was. Until we get more information, it's hard to tell which versions of WORD are problematic.
I'd suggest searching your posted text for any em-dashes. If it doesn't find any, then search for the 1/4 symbol. That will clearly indicate if you have anything to worry about.
If anyone here wants to ensure their text is clean before they post, I'd create a test sample using WORD's "Save as formatted html". You can then examine the html code in a text reader and see whether WORD includes anything in their "Symbol" font. If so, your version of WORD is questionable. I'd send the copy you saved to Lazeez along with which version of WORD it is, so he can figure out how to avoid this problem in the future.
It's more work for Lazeez, but I'm not sure how else to address it. But at least, if we do the necessary leg work on our own before sending him anything, we're at least minimizing our impact on his time.