[OpenLayers-Users] strange raster map behaviour

[Stefanie Weykam]

Hi list members,

We are observing very strange raster map behaviour – our raster maps are 
rendered with a slight shift towards south and east. The shift magnitude 
also seems to be scale dependant (a bit more in x and less in y).

The maps are correctly displayed in another client (gvSIG) so the WMS 
should be alright.

Also note that a GetFeatureInfo request returns the correct value (right 
value in the right place).
Could it be a rendering artefact ?? Is there any workaround?

Additional info:
-Vector layers are not effected
-No reprojection envolved (no google maps or any other ref-systems than 
unprojected geographic coordinates)
-GetFeatureInfo - Maxfeatures set to 1
-All testing done at scales where map pixels size was much bigger than 
screen pixel size
-WMS generated by MapServer 5.2.1 based on TIFs created in ArcGIS
-OpenLayers 2.8 -- $Revision: 9492 $

Any comments are highly appreciated,
Kind regards,
Stefanie