GS crashed when revising listings (see attached crash log)
GS gave strange errors when revising only “Handling Time” but revised the same offers just fine when “revise entire listing” was selected. (see attached screenshot)
Could it be that you have your own FTP server selected in the GarageSale preferences > eBay > eBay Images?
If yes it’s worth a try to switch it to eBay’s picure service or GarageSale’s image service just for test purposes. Does it still crash after switching the image service?