From the old bug system:

• style editor issues -- can only use multiple styles when in html view (bold and italic on same words, for example)
• if you press return when at the beginning of a header line, the previous line becomes a header.  (this causes screwups with the table of contents among other things)
• Can't save from html mode
• Inserted text at the beginning of a link becomes part of the link - annoying (eg, adding checks in our weekly action lists)