IDV display error

Dear IDV users

I'm trying to modify our in house data to comply with CF convention and
also to work with IDV.
Here http://www.cs.cas.cz/~lehner/t2.nc is a small portion, a sample. It can be loaded well, it show
the correct area. But if I try to display it show the following error.


Unable to load t2 field

java.lang.NullPointerException
    at
ucar.nc2.dataset.CoordinateAxis2D.getCoordValues(CoordinateAxis2D.java:86)
    at
ucar.unidata.data.grid.GeoGridAdapter.getInitialSpatialDomain(GeoGridAdapter.java:735)
    at
ucar.unidata.data.grid.GeoGridAdapter.getSpatialDomainSet(GeoGridAdapter.java:381)
    at
ucar.unidata.data.grid.GeoGridAdapter.getFlatField(GeoGridAdapter.java:1033)
    at
ucar.unidata.data.grid.GeoGridAdapter.makeSequence(GeoGridAdapter.java:1162)
    at
ucar.unidata.data.grid.GeoGridAdapter.getSequence(GeoGridAdapter.java:983)
    at
ucar.unidata.data.grid.GeoGridDataSource.makeFieldImpl(GeoGridDataSource.java:832)
    at
ucar.unidata.data.grid.GeoGridDataSource.getDataInner(GeoGridDataSource.java:604)
    at ucar.unidata.data.DataSourceImpl.getData(DataSourceImpl.java:1510)
at ucar.unidata.data.DirectDataChoice.getData(DirectDataChoice.java:319)
    at ucar.unidata.data.DataChoice.getData(DataChoice.java:550)
    at ucar.unidata.data.DataInstance.getData(DataInstance.java:239)
    at ucar.unidata.data.DataInstance.getData(DataInstance.java:203)
    at
ucar.unidata.data.grid.GridDataInstance.init(GridDataInstance.java:204)
    at
ucar.unidata.data.grid.GridDataInstance.<init>(GridDataInstance.java:161)
    at
ucar.unidata.data.grid.GridDataInstance.<init>(GridDataInstance.java:142)
    at
ucar.unidata.idv.control.PlanViewControl.doMakeDataInstance(PlanViewControl.java:1050)
    at
ucar.unidata.idv.control.DisplayControlImpl.initializeDataInstance(DisplayControlImpl.java:2719)
    at
ucar.unidata.idv.control.DisplayControlImpl.setData(DisplayControlImpl.java:2701)
    at
ucar.unidata.idv.control.PlanViewControl.setData(PlanViewControl.java:415)
    at
ucar.unidata.idv.control.ContourPlanViewControl.setData(ContourPlanViewControl.java:115)
    at
ucar.unidata.idv.control.PlanViewControl.init(PlanViewControl.java:321)
    at
ucar.unidata.idv.control.DisplayControlImpl.init(DisplayControlImpl.java:1172)
    at
ucar.unidata.idv.control.DisplayControlImpl.init(DisplayControlImpl.java:925)
    at
ucar.unidata.idv.ControlDescriptor.initControl(ControlDescriptor.java:946)
    at ucar.unidata.idv.ControlDescriptor$1.run(ControlDescriptor.java:874)
    at ucar.unidata.util.Misc$2.run(Misc.java:931)

It's a little bit strange, the two validators
http://motherlode.ucar.edu:8080/thredds/cdmValidate.html and
http://titania.badc.rl.ac.uk/cgi-bin/cf-checker.pl show correct results.
I'm running IDV from webstart on linux platform (ubuntu).
Would you please take a look at this problem?

Lukas