IPhoto on Mountain Lion refusing to delete and constantly crashing

Question

When I upgraded to Mountain Lion (last month),iPhoto began crashing every other time I used it AND it also refused to delete any of my photos! For instance, I will drag an individual picture over to the trash, drop it when it is highlighted, but the picture will still be there with nothing in the trash! This deleting problem happened the first time I started Mountain Lion on my computer. After I updated to OSX 10.8.1, it finally resolved itself until about a couple days ago, when the problem came back. The trash refusal problem appeared again after my entire computer restarted while I was deleting pictures off (instant shut off and automatic restart). No message or anything though. Really strange. There doesn't seem to be any problem like this on the web. Any solutions?

Answer 1

Option 1
Back Up and try rebuild the library: hold down the command and option (or alt) keys while launching iPhoto. Use the resulting dialogue to rebuild. Choose to Repair Database. If that doesn't help, then try again, this time using Rebuild Database.
If that fails:
Option 2
Download iPhoto Library Manager and use its rebuild function. (In Library Manager it's the FIle -> Rebuild command)
This will create an entirely new library. It will then copy (or try to) your photos and all the associated metadata and versions to this new Library, and arrange it as close as it can to what you had in the damaged Library. It does this based on information it finds in the iPhoto sharing mechanism - but that means that things not shared won't be there, so no slideshows, books or calendars, for instance - but it should get all your events, albums and keywords, faces and places back.
Because this process creates an entirely new library and leaves your old one untouched, it is non-destructive, and if you're not happy with the results you can simply return to your old one. 
Regards
TD