Same here on Windows, both main and latest devprev.

I found that I could open the puzzle once, but the client crashes after that.

The crashes generated a debug.txt with the message "Cannot type atom with element 'Cu'". So it has something to do with the copper ion that's included in the density.

I found that moving (or hiding, or renaming, or deleting) the files for this puzzle under the "puzzles" directory allows the puzzle to be opened again. The list of manual saves is then available, but opening a manual save again crashes the client.

Simply closing and restarting the client will also cause a crash.

The "puzzles" directory for this puzzle would be something like c:\Foldit\puzzles\0002003183\*usernum*\default, where 2003183 is the numeric id for puzzle 1315, usernum is your numeric user id, and "default" is the track name. This directory normally contains "autosave.ir_solution", and various other ir_solution files. The file "autosave.ir_solution" seems to be the one loaded when the client restarts.

Manual solutions are stored directly under c:\Foldit or the equivalent, and again end in "ir_solution".

So far, there doesn't seem to be a way to continue with this puzzle.

See also comments for puzzle 1315.

Yes I crash also on openning 315.
I am running win 10 64-bit

Yes I crash also on openning 315.
I am running win 10 64-bit

No crash on open (not closing) in 3 clients (Windows 7) but

I don't see the Cu.

Running win 7 64 bit, experiencing the same as above.

FYI... opened without incident, but noticed that while it was open (and minimized with nothing running) that the other puzzles slowed to molasses-in-January speed and finally crashed upon closing this evening when I noticed the spinning mac rainbow ball of doom. Took my finder down with it, apparently. No log info.

(this above took place while, during, and after it was pulled)