Ben, in your post on the 21st of May above seems like there is a mismatch in the markup:

tpl: ... <tpl><div> ... </tpl></div></tpl>

isn't there?

Could you, please, provide a fixed one, if there is or assert that it is written correctly and should be used as-is?

Also, what exactly in that expression is the "l." is it "this" if I put this under the tpl config of the combo?

And by the way nullRecord, mentioned in the same post, is an undocumented config option for the Labkey.ext.Store?

Thanks.