Reading your instructions here (https://www.pricetapestry.org/node/466) to allow a search for 3 letter words, I had my host change my server from 4 to 3.
I did not have to make the advised change to pto_search.php as that was already 3.
I then went to automation toll and ran each feed.
Then went to Feed Management and clicked on Slow Import, but it got stuck on deleting. It did delete a number of products but then after about an hour I aborted. I tried a smaller feed and that just gets stuck too.
I haven't done anything else since yesterday, when it was working fine.
Any ideas? Would making that change on the server have done anything?