Fairly new at QGIS, but everything’s gone well so far.
I’m running QGIS version 1.8 on a Mac (OSX 10.8) and GDAL 1.10, and other GDAL tools (like Merge and Georeferencer) work just fine.
When I try to use the Clipper tool to clip a raster image using a vector shp file, I don’t see the dialog options that are shown on various forums (for example, here). There is no “No data value” control and under Clipping Mode I just have the option to clip to a rectangular extent. What am I doing wrong?