Feature request

 From:  tyglik
1232.3 In reply to 1232.1 
>>Sometimes I try to cut a curve with another curve, and it will cut where it suppose to, but sometimes cut some other random point on that curve as well.

Each closed curve has so called "seam" - it means the point where the start end end of curve touch - the "random" point is a location of the seam when you trim/split the closed curve by open one (only one intersection between curves exists) or by point.