Can someone provide insight into why qgis becomes unresponsive when i try to add a raster layer? Specifically a .sid raster from NAIP imagery. I can no longer add these raster layers to projects, even to projects which already have raster layers from the same source (NAIP *.sid)added previously. The same .sid raster files that will not load now have been successfully added to qgis projects in the past.
What I have tried: Uninstalled qgis 1.7 and replaced with qgis 1.7.4 using the OSGe04W installer. Moved raster files from external to internal hard drive. Freed up internal hard drive space (>25% of capacity). Tried multiple raster files. I only have 1Gb of RAM, but this has been sufficient in the past. The raster file sizes are on average around 750Mb.