I haven't seen this one, but feeling the same about MCD 6.0 (including PR1), seeing a handful of weird, little bugs... most are just little annoyances and can be dealt with, but we have halted all upgrades to 6.0 for the time being until it smooths out some. Two of my techs have reported that at randoms they will get "Non-unique match" responses in Maintenance commands for no reason, then a second issue of the same command works fine, just odd little stuff.