Created attachment 53608 [details]
Correctly solved puzzle marked as incorrect.

Version:           0.4 (using KDE 4.5.3) 
OS:                Linux

I am sure that my solution would give the exact same output. The solution that the application expected also does the same, so there are multiple solutions. The most frustrating one was where the last ball to place was not supposed to affect the output of any of the numbered beams or the u-turn beams. It could go in multiple positions while satisfying that requirement. I picked one at random and clicked Done! Lo and behold the application was expecting it to go in one of the other positions. How am I supposed to know which solution it is expecting?

Attached is a screen cap of the particular puzzle I am talking about. The "incorrect" ball is was the last one I added. I say the solution is valid, the application says otherwise.

Reproducible: Sometimes

Steps to Reproduce:
Solve a puzzle that has multiple possible solutions, click Done!
It may or nay not like your solutions.

Actual Results:  
After placing all the balls where I think they should go and clicking the Done! button, the application checks to see if I placed the balls exactly where it expects them regardless of if the output (lines) end up where they are supposed to go.

Expected Results:  
After placing all the balls where I think they should go and clicking the Done! button the application checks my answer and decides if I've successfully solved the puzzle.

OS: Ubuntu Lucid (i686) release 2.6.32-25-generic-pae
Compiler: cc