We aren't seen a problem with 7.0.1 on jboss tools M2 nor M3 (nightly build).
If you are still seeing these please open bugreport - thanks.
Same problem here. I´m using JBossAS Tools 2.3.0.v20110829-0855-H677-M3
I did not had this problem with JBossAS Tools 2.3.0.v20110809-1550-H618-M3
I got the same error with the current nightly build ( 2.3.0.v20110829-0855-H677-M3) and created this bugreport: JBIDE-9649