So, I don't know what happened, but Shapeshifter solver has started randomly giving me this just now. In the middle, I logged into my account and started a new game (right from Level 1 of the puzzles) to see if that would solve it.
[5/20/2013 12:55:59 AM] ShapeShifter Solver Completed.
[5/20/2013 12:55:59 AM] ShapeShifter Solver: Error with puzzle.
[5/20/2013 12:55:58 AM] ShapeShifter Solver: LEVEL 1 Solution Found! 00:00:00.1020488 elapsed.
[5/20/2013 12:55:58 AM] ShapeShifter Solver: LEVEL 1 (3x3, 1 shapes, 2 states) this may take a while (complexity = 3).
[5/20/2013 12:55:57 AM] ShapeShifter Solver Started.
[5/20/2013 12:55:54 AM] ShapeShifter Solver Completed.
[5/20/2013 12:55:54 AM] ShapeShifter Solver: Error with puzzle.
[5/20/2013 12:55:54 AM] ShapeShifter Solver: LEVEL 1 Solution Found! 00:00:00.1019868 elapsed.
[5/20/2013 12:55:54 AM] ShapeShifter Solver: LEVEL 1 (3x3, 1 shapes, 2 states) this may take a while (complexity = 3).
[5/20/2013 12:55:52 AM] ShapeShifter Solver Started.
[5/20/2013 12:54:03 AM] ShapeShifter Solver Completed.
[5/20/2013 12:54:03 AM] ShapeShifter Solver: Error with puzzle.
[5/20/2013 12:53:53 AM] ShapeShifter Solver: LEVEL 1 Solution Found! 00:00:00.1020279 elapsed.
[5/20/2013 12:53:53 AM] ShapeShifter Solver: LEVEL 1 (3x3, 2 shapes, 2 states) this may take a while (complexity = 27).
[5/20/2013 12:53:52 AM] ShapeShifter Solver Started.
[5/20/2013 12:53:32 AM] ShapeShifter Solver Completed.
[5/20/2013 12:53:32 AM] ShapeShifter Solver: Error with puzzle.
[5/20/2013 12:53:31 AM] ShapeShifter Solver: LEVEL 35 Solution Found! 00:00:00.1135191 elapsed.
[5/20/2013 12:53:31 AM] ShapeShifter Solver: LEVEL 35 (6x6, 1 shapes, 2 states) this may take a while (complexity = 9).
[5/20/2013 12:53:29 AM] ShapeShifter Solver Started.
[5/20/2013 12:52:59 AM] ShapeShifter Solver Completed.
[5/20/2013 12:52:59 AM] ShapeShifter Solver: Error with puzzle.
[5/20/2013 12:52:58 AM] ShapeShifter Solver: LEVEL 35 Solution Found! 00:00:00.1028431 elapsed.
[5/20/2013 12:52:58 AM] ShapeShifter Solver: LEVEL 35 (6x6, 1 shapes, 2 states) this may take a while (complexity = 9).
[5/20/2013 12:52:57 AM] ShapeShifter Solver Started.
[5/20/2013 12:52:41 AM] ShapeShifter Solver Completed.
[5/20/2013 12:52:41 AM] ShapeShifter Solver: Error with puzzle.
[5/20/2013 12:52:41 AM] ShapeShifter Solver: LEVEL 35 Solution Found! 00:00:00.1019915 elapsed.
[5/20/2013 12:52:41 AM] ShapeShifter Solver: LEVEL 35 (6x6, 1 shapes, 2 states) this may take a while (complexity = 9).
[5/20/2013 12:52:36 AM] ShapeShifter Solver Started.
[5/20/2013 12:52:33 AM] ShapeShifter Solver Completed.
[5/20/2013 12:52:32 AM] ShapeShifter Solver: Error with puzzle.
[5/20/2013 12:52:32 AM] ShapeShifter Solver: LEVEL 35 Solution Found! 00:00:00.6004671 elapsed.
[5/20/2013 12:52:31 AM] ShapeShifter Solver: LEVEL 35 (6x6, 1 shapes, 2 states) this may take a while (complexity = 9).
[5/20/2013 12:52:29 AM] ShapeShifter Solver Started.
I'll try again in a few hours, see what I get, and update accordingly.
You can find out the usual "junk" items in the dump just by googling, but I'm not sure about things beyond that.
I haven't tried the other features out, but the Shapeshifter solver works great! I'm on level 36 so far, with no real problems. Kudos for making it.
These are the items I found by googling, that are apparently UBs :
Turmac
Old Paper
Apple Core
How Its Dung
Compost Dung Right
Another thing: the FQ automator seems to have started a new quest, but hasn't completed it.. I've been checking periodically for the past 5ish hours. And I had almost 70K NP on hand, enough for the program to buy the item.
Is there a reason the shape shifter solver only goes to level 20? 
Mine went up to 35, then started giving me "errors." You can see the log above.