I may have found a workaround:
1) Re-open your post to edit (within the 5-minute-or-so window of editing opportunity)
2) Make your changes — corrections and/or additions
3) Highlight your newly edited entry in its entirety, selecting from first word to last
4) CUT your newly edited text (so the comment field becomes blank)
5) PASTE your cut text back into the comment field, so that it is now displays the fresh version
6) SAVE (click on Save Changes to post)
This trick just worked for me; it might work for you as well. Let us know!
