Ultimate 1.0.1 - IHTFP concurrent modification exception

2013-04-20 00:08:09 [INFO] [STDERR] java.util.ConcurrentModificationException
2013-04-20 00:08:09 [INFO] [STDERR] 	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:839)
2013-04-20 00:08:09 [INFO] [STDERR] 	at java.util.HashMap$ValueIterator.next(HashMap.java:868)
2013-04-20 00:08:09 [INFO] [STDERR] 	at bq.a(SourceFile:24)
2013-04-20 00:08:09 [INFO] [STDERR] 	at cd.a(SourceFile:114)
2013-04-20 00:08:09 [INFO] [STDERR] 	at bq.a(SourceFile:25)
2013-04-20 00:08:09 [INFO] [STDERR] 	at cd.a(SourceFile:114)
2013-04-20 00:08:09 [INFO] [STDERR] 	at bq.a(SourceFile:25)
2013-04-20 00:08:09 [INFO] [STDERR] 	at by.a(SourceFile:26)
2013-04-20 00:08:09 [INFO] [STDERR] 	at cd.a(SourceFile:114)
2013-04-20 00:08:09 [INFO] [STDERR] 	at bq.a(SourceFile:25)
2013-04-20 00:08:09 [INFO] [STDERR] 	at cd.a(SourceFile:114)
2013-04-20 00:08:09 [INFO] [STDERR] 	at bq.a(SourceFile:25)
2013-04-20 00:08:09 [INFO] [STDERR] 	at cd.a(SourceFile:114)
2013-04-20 00:08:09 [INFO] [STDERR] 	at ca.a(CompressedStreamTools.java:140)
2013-04-20 00:08:09 [INFO] [STDERR] 	at aam.a(AnvilChunkLoader.java:198)
2013-04-20 00:08:09 [INFO] [STDERR] 	at aam.c(AnvilChunkLoader.java:184)
2013-04-20 00:08:09 [INFO] [STDERR] 	at aiw.b(SourceFile:29)
2013-04-20 00:08:09 [INFO] [STDERR] 	at aiw.run(SourceFile:22)
2013-04-20 00:08:09 [INFO] [STDERR] 	at java.lang.Thread.run(Thread.java:722)