Traceback (most recent call last):
  File "eggbot.py", line 1154, in <module>
    e.affect()
  File "C:\Program Files (x86)\Inkscape\share\extensions\inkex.py", line 268, in affect
    self.effect()
  File "eggbot.py", line 220, in effect
    self.plotToEggBot()
  File "eggbot.py", line 440, in plotToEggBot
    self.recursivelyTraverseSvg( self.svg, self.svgTransform )
  File "eggbot.py", line 499, in recursivelyTraverseSvg
    self.DoWePlotLayer( node.get( inkex.addNS( 'label', 'inkscape' ) ) )
  File "eggbot.py", line 898, in DoWePlotLayer
    if str.isdigit( CurrentLayerName[:stringPos] ):
TypeError: descriptor 'isdigit' requires a 'str' object but received a 'unicode'

diff --git a/inkscape_driver/eggbot.py b/inkscape_driver/eggbot.py
index b209b29..d24fa0b 100755
--- a/inkscape_driver/eggbot.py
+++ b/inkscape_driver/eggbot.py
@@ -884,7 +884,7 @@ class EggBot( inkex.Effect ):

                TempNumString = 'x'
                stringPos = 1
-               CurrentLayerName = string.lstrip( strLayerName ) #remove leading whitespace
+               CurrentLayerName = string.lstrip( strLayerName.encode( 'ascii', 'ignore' ) ) #remove leading whitespace

                # Look at layer name.  Sample first character, then first two, and
                # so on, until the string ends or the string no longer consists of