Thresholdvalue in scientific notation not displayed/stored correctly

Thresholding with scientific notation such as 1.0E-6 works but threshold-value is not stored correctly in database:

Debug-Output from collectd:
DEBUG [CollectdScheduler-50 Pool-fiber1] SnmpAttribute: Visiting attribute node[23].interfaceSnmp[Radio_Interface__0].CerRfuStatRadioBER [.1.3.6.1.4.1.2281.10.5.1.1.5] = 1e-6
DEBUG [CollectdScheduler-50 Pool-fiber1] CollectorThresholdingSet: hasThresholds: if@CerRfuStatRadioBER? true
DEBUG [CollectdScheduler-50 Pool-fiber1] ThresholdingVisitor: visitAttribute: storing value 1.0E-6 for attribute named CerRfuStatRadioBER
INFO [CollectdScheduler-50 Pool-fiber1] CollectorThresholdingSet: applyThresholds: Processing threshold CerRfuStatRadioBER : {evaluator=high, dsName=CerRfuStatRadioBER, dsType=if, evaluators=[{ds=CerRfuStatRadioBER, value=1.0E-6, rearm=1.0E-13, trigger=1}]}

corresponding eventparms in database
"ifLabel=Radio_Interface__0(string,text);ifIndex=1(string,text);label=Radio_Interface__0(string,text);ds=CerRfuStatRadioBER(string,text);value=?(string,text);instance=1(string,text);trigger=1(string,text);rearm=1.0E-13(string,text);threshold=1.0E-6(string,text);reason=Configuration has been changed(string,text)"

Version: 1.8.3
Server Time: Fri Sep 10 09:03:04 CEST 2010
Client Time: Fri Sep 10 2010 09:03:04 GMT+0200
Java Version: 1.6.0_12 Sun Microsystems Inc.
Java Virtual Machine: 11.2-b01 Sun Microsystems Inc.
Operating System: Linux 2.6.26-2-686 (i386)
Servlet Container: jetty/6.1.24 (Servlet Spec 2.5)
User Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.2.9) Gecko/20100824 Firefox/3.6.9 GTB7.1 (.NET CLR 3.5.30729)