Comment 1 for bug 1502041

- confirmed on Windows 7, Inkscape 0.91 r13725 (Jan 30 2015)
- also confirmed on Windows XP, Inkscape rev 14357, using the attached drawing

there is a minor difference in the format used to specify the orientation. When dragging guides from the rulers, the following notation is used for the direction: orientation="1,0". On the other hand, the Python guides extension uses the notation : orientation="1052.3622,0". These are mathematically equivalent and do not affect the rendering of the guides, but it may be affecting the guillotine extension in some way.