Hi,
here are my steps to reproduce the bug:
0. have a dataset open
1. choose Data / Edit values
2. Click on the "add" (= "+") button, choose "add variable"
3. You get a window to enter the new name; enter something with a single
underscore, e.g. "hey_ho"
4. Click on the accept button (= tick mark; you can also enter obs
values if you like)
5. In the main window with the variable list, the new variable appears
with a duplicated underscore, "hey__ho".
This is with the Jan 4th snapshot.
thanks
sven