Reproduced with Inkscape 0.46+devel r22476 on OS X 10.5.8
all corners of the (unblurred, stroked) path are cut off when exporting 'selection' or drawing' to bitmap (bbox settings have no influence as bitmap export always uses visual bbox).
Note: I am not sure if there doesn't already exist a separate bug report about it - this bug originally was about cut-off blurs when exporting to bitmap. The stroke cap/miter bbox problem is a different issue, unrelated to including the blur into the visual bbox.
Reproduced with Inkscape 0.46+devel r22476 on OS X 10.5.8
all corners of the (unblurred, stroked) path are cut off when exporting 'selection' or drawing' to bitmap (bbox settings have no influence as bitmap export always uses visual bbox).
Note: I am not sure if there doesn't already exist a separate bug report about it - this bug originally was about cut-off blurs when exporting to bitmap. The stroke cap/miter bbox problem is a different issue, unrelated to including the blur into the visual bbox.