Not reproduced with Inkscape 0.48 and 0.48+devel r9731 on OS X 10.5.8:
The file 'PN-AlarmeIntrusionBroken.svg' (unchanged) opens in Inkscape without error (besides the missing referenced bitmap files) and it does not hang when rendering the initial view / zoom level (but it takes some seconds for rendering, because it has to render it twice - the window is resized to full-screen mode).
Not reproduced with Inkscape 0.48 and 0.48+devel r9731 on OS X 10.5.8:
The file 'PN-AlarmeIntru sionBroken. svg' (unchanged) opens in Inkscape without error (besides the missing referenced bitmap files) and it does not hang when rendering the initial view / zoom level (but it takes some seconds for rendering, because it has to render it twice - the window is resized to full-screen mode).