Just got this:
SCHWERWIEGEND: Terminal error: [ObjectDB 2.3.3] Unexpected exception (Error 990) Generated by Java HotSpot(TM) 64-Bit Server VM 1.6.0_26 (on Mac OS X 10.6.8). Please report this error on http://www.objectdb.com/database/issue/new com.objectdb.o.InternalException: java.lang.NullPointerException: null java.lang.NullPointerException at com.objectdb.o.BIT.m(BIT.java:278) at com.objectdb.o.WHP.u(WHP.java:360) at com.objectdb.o.WHP.t(WHP.java:327) at com.objectdb.o.WHP.s(WHP.java:266) at com.objectdb.o.WHP.p(WHP.java:160) at com.objectdb.o.QPN.d(QPN.java:86) at com.objectdb.o.QRC.u(QRC.java:189) at com.objectdb.o.QRM.U4(QRM.java:245) at com.objectdb.o.MST.U4(MST.java:947) at com.objectdb.o.WRA.U4(WRA.java:290) at com.objectdb.o.WSM.U4(WSM.java:113) at com.objectdb.o.STC.r(STC.java:426) at com.objectdb.o.SHN.aj(SHN.java:489) at com.objectdb.o.SHN.K(SHN.java:156) at com.objectdb.o.HND.run(HND.java:133) at java.lang.Thread.run(Thread.java:680)