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January 27, 2010 r2j7 / Forum Nokia: Ovi Publish site http://info.publish.ovi.com/ includes Publisher's Guide which provides valid info regarding the OVI signing requirements for Java ME applications.
Regarding the Verisign limitation: for Series 40 5th Edition, Feature Pack 1 Ovi Publisher guide states on page 49/77:
NOTE: Verisign signed MIDlets cannot be installed to Series 40 5th Edition, Feature Pack 1 devices.
This is due to this Known Issue: KIJ000839 - VeriSign signed MIDlets cannot be installed on Series 40 5th Edition, Feature Pack 1 devices