EDIT2: Bleh sorry I'm back. When you do !guides, towards the bottom of that listing is a section that goes something like this: Can you think of any changes or additions? Contact your org leader or the <a href='chatcmd:///tell Plugsz'Guide Developer, Plugsz on RK1'
This is actually not a problem related to apostrophes or quotes, it's a broken link.
Original:
<a href='chatcmd:///tell Plugsz' /a>Guide Developer, Plugsz</a> on RK1'
Changing it to a legal link works fine:
<a href='chatcmd:///tell Plugsz'>Guide Developer, Plugsz</a> on RK1'
Note the removed /a in the first < . . . >