bug in slicer 0.7.2

I just found a bug in slicer 0.7.2

jhead 0.5 marlin pronterface

when i print the joined stl it work correctly if i ask a 0.5 layer

if I ask 0.1 or 0.25 layer i got 2 pb :

some square defects in the wall of the glass (see pict)

and at some point the layer is only one point (for 2.3 layer) before resuming the normal shape. it result in the mess you could see near the print on the pict

it's easy to see the pb on the gcode visualisation in pronterface

look like a bug in slicer

thank you

You forgot the picture.

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Most of my technical comments should be correct, but is THIS one ?
Anyway, as a rule of thumb, always double check what people write.

sorry
here the pic