BUG: Potentiometer wiper position change on file open (or on file save?)

[TishSerg]

When my circuit has a potentiometer with some non-central wiper position set its position is slightly off the set value on every save-open cycle. How to reproduce:

1. Create a blank circuit
2. Place potentiometer there
3. Make its total resistance, say, 10k
4. Set its wiper to, say, 7.6k/2.4k
5. Save the circuit to a file
6. Open the file
7. See the wiper position of the potentiometer is 7.5k/2.5k
8. Save again
9. Open again
10. See the wiper position of the potentiometer now is 7.4k/2.6k
11. And so on...

Every save-open makes the wipers of the potentiometers a little off.