Hmm, that is a tough one... certainly honesty is best, that cannot be emphasized enough; and a lot may depend upon how you describe what happened and what you learned from it, and how serious and/or intentional the 'breach' was. Of course it helps if a former supervisor would still write a glowing rec and even more so if they were able to comment on the incident and shed more light on it in any sort of positive way, but certainly it will be tougher in terms of admissions because you do need to explain and defend what happened and questions that may arise, so you start off having to build yourself up in that way. Wishing you the best.
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