I'm using RC6 so no idea if the following is fixed already, but I found nothing on the forum and bugtracker.
mission spedition (map spedition06)
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While walking up the stairs to the roof my trooper fell through the last tile and was trapped under the stairs.
mission falconcrash (map falcon_crash04)
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Trooper got trapped on the debris. Also my men got shot down in the transport through the apparently thin walls. Don't know if this is a general problem.
I tried to run specific missions with the mission command, but then I have no troops in the field. Is there a way to trigger missions on the geoscape?