[pilcrow]

Logs:
13:09 - Cadmium Alchemist said in Say: Test to see if this breaks it before: é <i>italics text<i> nonitalics text.
13:09 - Cadmium Alchemist said in Say: Test to see if this breaks it after: <i>italics text</i> nonitalics text. é
13:10 - Cadmium Alchemist said in Say: Test to see if this breaks it during: <i>italics é text<i> nonitalics text.
13:11 - Cadmium Alchemist said in Say: uhhh. ó <i>other<i> accents?
13:13 - Cadmium Alchemist said in Say: é <i>italics text<i> nonitalics text </i>italics text</i> nonitalics text

Accents and possibly some other characters break the next italics ( ` ) tags that follow after. An examination of the logs shows what the exact problem is - that it fails to end the tag and creates a second instance of <i> instead of </i>
Bolding is unaffected. I don't know what else to really test this with as far as characters go, but accents are a pain since some characters do have them in their names.