Resource Graphs and custom time period error while refreshing

Description of the issue :

• On OpenNMS web page
• I click on "Node List"
• I click on a server with several monitored resources
• I click on select all to get a page with all graphes
• I click on submit
• On time period I select custom
• I click on Apply Custom Time Period
• If I click again on Apply Custom Time Period or if I wait for auto-refreshing period then I got an "page not found" error like :

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Page Web inaccessible

La page Web à l'adresse http://iint-opennms-test.itron.com:8980/opennms/graph/results.htm?resourceId=node%5B14%5D.nodeSnmp%5B%5D&resourceId=node%5B14%5D.interfaceSnmp%5BVMware_Accelerated_AMD_PCNet_Adapter_-005056a57815%5D&resourceId=node%5B14%5D.responseTime%5B192.168.49.77%5D&resourceId=node%5B14%5D.hrStorageIndex%5B1%5D&resourceId=node%5B14%5D.hrStorageIndex%5B2%5D&resourceId=node%5B14%5D.hrStorageIndex%5B3%5D&resourceId=node%5B14%5D.hrStorageIndex%5B4%5D&resourceId=node%5B14%5D.hrStorageIndex%5B8%5D&resourceId=node%5B14%5D.hrStorageIndex%5B9%5D&resourceId=node%5B14%5D.hrStorageIndex%5B5%5D&resourceId=node%5B14%5D.hrStorageIndex%5B7%5D&resourceId=node%5B14%5D.hrStorageIndex%5B6%5D&resourceId=node%5B14%5D.sinfNetInstance%5B25.77.83.32.84.67.80.32.76.111.111.112.98.97.99.107.32.105.110.116.101.114.102.97.99.101%5D&resourceId=node%5B14%5D.sinfNetInstance%5B36.86.77.119.97.114.101.32.65.99.99.101.108.101.114.97.116.101.100.32.65.77.68.32.80.67.78.101.116.32.65.100.97.112.116.101.114%5D&resourceId=node%5B14%5D.sinfCpuInstance%5B1.48%5D&resourceId=node%5B14%5D.sinfCpuInstance%5B1.49%5D&resourceId=node%5B14%5D.sinfCpuInstance%5B1.50%5D&resourceId=node%5B14%5D.sinfCpuInstance%5B1.51%5D&resourceId=node%5B14%5D.sinfCpuInstance%5B6.95.84.111.116.97.108%5D&resourceId=node%5B14%5D.sinfLDskInstance%5B2.67.58%5D&resourceId=node%5B14%5D.sinfLDskInstance%5B2.68.58%5D&resourceId=node%5B14%5D.sinfLDskInstance%5B2.69.58%5D&resourceId=node%5B14%5D.sinfLDskInstance%5B2.83.58%5D&resourceId=node%5B14%5D.sinfLDskInstance%5B2.90.58%5D&resourceId=node%5B14%5D.sinfLDskInstance%5B6.95.84.111.116.97.108%5D&reports=all&relativetime=custom&zoom=&startMonth=3&startDate=15&startYear=2010&startHour=4&endMonth=3&endDate=15&endYear=2010&endHour=6 est peut-être temporairement inaccessible ou a peut-être été redirigée de façon permanente vers une nouvelle adresse Web.

Plus d'informations sur cette erreur
Message d'erreur original ci-dessous

Erreur 324 (net::ERR_EMPTY_RESPONSE) : Erreur inconnue

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If I select only one or two resource to graph there is no error.

Should parameters be transmit using a POST method instead of a GET method in URL ?