I use the putty Proxy and Tunnel feature frequently. Until today I connected to my server through a putty tunnel. Since the 0.53 core has been integrated into WinSCP 2.2 I was anxious to test the proxy functionality in WinSCP.
The problem is the following.
The session-parameter "Connection - Sending of Null packets to keep session alive" offers just a setting in minutes, Putty uses seconds instead. Since I connect through a proxy, the proxy drops my idle connection with a timeout far below the lowest setting of 1 minute. In putty I use 5 seconds instead which keeps my connection open w.o. problems.
Anyway, thanks for the great work!