There has been some discussion about approving new tags in both the cb and the thread Proposal: Adding to Approved HTML Tags. The most important of these tags were INS, DEL, and Q.
Finally this has been brought to a decision: demerphq has added these three tags to Perl Monks Approved HTML tags.
The decision about the less important (imo) tags (ABBR ACRONYM CITE DFN KBD SAMP VAR etc) is still pending.
The only problem with this is that there are some nodes that contain <del> unquoted (meaning for example the delete button), and those now have to edited: <del> must either be html-escaped as <del> or put in code tags. Two such nodes have already been corrected, but there might be some others.
Update: I've forgot this, but Q is also allowed in the cb.
Edit by tye: Note that the Q tag is no longer allowed in nodes or chatter (see replies for more info).
In reply to INS, DEL, Q tags now allowed in posts by ambrus
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