Lightroom 5.7 has a bug with star ratings. Once I switch from no rating to any star rating then select "filters off", the develop module then goes to show 0 photos. I have to switch to the Library module then back to Develop for things to go back to normal. I've never had this problem before and it's debilitating. Sorting is an important feature to me and I hope you fix this before even releasing LR 6. I'm on Win 7 and use the 64-bit version of Lightroom.