File being written by another thread

[Ross Gardler]

Is anyone else seeing this error on ./build.sh test? (I'll assume 
silence means no)

* [49/16]   [0/0]     0.02s  743b    samples/subdir/hello.zip
java.util.ConcurrentModificationException: File 
D:\openSource\forrest\build\test
\build\site\samples\linking.pdf is already being written by another thread
        at 
org.apache.excalibur.source.impl.FileSource.getOutputStream(FileSourc
e.java:326)
X [0]                                     samples/linking.pdf   BROKEN: 
URI not
found: File 
D:\openSource\forrest\build\test\build\site\samples\linking.pdf is a
lready being written by another thread
        at org.apache.cocoon.bean.CocoonBean.processTarget(Unknown Source)
        at org.apache.cocoon.bean.CocoonBean.process(Unknown Source)
        at org.apache.cocoon.Main.main(Unknown Source)
Ross