Bug 1. The local browser (in commander) stops working sometimes. It allows me to select files and such, but I cannot browse to another local folder. Must restart WinSCP. (5.1.1 fixed that after sync it no longer goes broken, but it still continues to go broken sometimes)
Bug 2. Separate to above bug, I also get infinite loop of "Invalid Memory Access" dialogs sometimes. And I must kill the WinSCP from task manager.
Have not yet been able to come up steps to reproduce them reliably. Nevertheless both happens several times a day as I use WinSCP continuously.