Duplicating an LPE object doesn't fork the LPE, meaning the duplicate and the original keep sharing the same properties: any changes in LPE properties applied to the duplicate also shows up in the original, and vice-versa. This still occurs even after tweaking one of them with the F2 node tool, but the LPE does forks if the F1 tool is used (moving, resizing, etc.).
To reproduce the behaviour:
1. Make a Pattern along Path shape (I created a form, copied it, then used "Shape - From clipboard" to automatically apply the form)
2. Duplicate this shape
3. Modify the skeleton of the duplicate with the node tool, but not the F1 tool
4. Open the LPE dialogue and modify the duplicate from there. Example: change the width.
Result: the original shape gets modified as well. The reverse is also true.
This is quite visible with the new Powerstroke tool, because sometimes you duplicate an existing Powerstroke shape and tweak it just slightly. Those changes then show up with the original powerstroke.
@Johan - assigning to you based on
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