[iReport 5.0.1 / Ubuntu 12.04 : windows with i message null]

Not an answer, but I'm having this same problem with iReport 3.7.6. I'm running Linux Ubuntu 10.4 (Lucid), and suspect that a fairly recent Java update buggered something. Ideas?

[XML datasource only prints the first record]

I'm seeing the same thing with both 1.3.1 and 1.3.2. I get a detail band entry for each record in my XML, but the same information from the first record is displayed in each. Some general info for header data is displayed correctly, and comes from a different XPath than the data records. Ideas?