I have been trying out the new ST_Union in 1.4 and have a question.

I note that, whenever I hit an error like this:

NOTICE:  TopologyException: found non-noded intersection between 5.74214e+006 
7.36573e+006, 5.74304e+006 7.36666e+006 and 5.74339e+006 7.36629e+006, 
5.74304e+006 7.36666e+006 5.74304e+006 7.36666e+006

ST_Union fails to produce a result.

Is there anything I can do to address this TopologyException issue within 
PostGIS.

regards
Simon
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