Reproduced with Inkscape 0.48.0 and 0.48+devel r9942 on OS X 10.5.8
Workaround: as long as you choose from the preset values, use the mouse wheel to select the number while hovering over the entry field, without actually clicking into it (the mouse focus thus stays on-canvas).
Reproduced with Inkscape 0.48.0 and 0.48+devel r9942 on OS X 10.5.8
Workaround: as long as you choose from the preset values, use the mouse wheel to select the number while hovering over the entry field, without actually clicking into it (the mouse focus thus stays on-canvas).
Does not happen in Inkscape 0.47.