gallery lot is taking forever to save

I haven't had the issue in a couple weeks but back when I was having this problem,I could get it to fix itself by doing "Ctrl+Alt+Delete". I wouldn't have to close anything and really take any further action, but calling it up and toggling out of the game and back in seemed to kick-start it again and it would resume.  I would then be able to re-save it successfully. 

So this isn't a real fix but I would suggest trying it since it's quick and easy.

I would also suggest clearing the cache and that type of stuff

1. Delete the localthumbscache.package file in this directory. ...
2. Go inside the cache folder and delete all files that end in .cache, but do not delete the actual directory.
3. Go back, then to the cachestr folder.

Also, if it's been ages since you played you might want to do a clean install.