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I have just released an appnote that covers that very subject. It should be on the web in the next few days. It's not as simple as grounding the inputs...
In the meantime, you can get a flavor of it from Ron's LM324 Op-Amp appnote (which I basically stole and modified for comparators in that section). They both have a similar input stage, but you cannot put the comparator in a feedback loop.