Blank AWRs in HTML format

I've just began evaluating trial version of DbVisualizer Pro in search of good alternative for SQL Developer on Linux platform so I'm pretty new here. I must admit tool looks quite promising but for now two issues came into my way when working with Oracle: - with JRE 1.7.0 (I'm not sure about exact build number) many actions in "DBA Views" hanged the whole program with progress window "Preparing "Create snapshot" action" (or something very similar). Only by accident found a solution with downgrading jre to 1.6. Could you advise on which exact jre7 version DbVisualizer is confirmed to work ok in Linux environment? - after snapshot related actions started working fine I've tried to generate reports through "Run report" action. While for text based reports output generates fine, the output for HTML format is blank. Is there any option I miss? Regards

Thx a lot Roger. I can confirm that both HTML output and running actions under java7 in linux env work fine in 9.0.5.