Been having this problem with all betas and rc's as far as i remember. Takes often 2-4 attempts to connect to a drftpd server with these errors:
WinSock 2.0 -- OpenSSL 0.9.7d 17 Mar 2004
[R] Connecting to ! -= drftpd =- -> IP=213.112.xxx.xxx PORT=2121
[R] Connected to ! -= drftpd =-
[R] 220 DrFTPD 1.1.4
http://drftpd.org
[R] AUTH SSL
[R] 234 AUTH SSL successfull
[R] Connected. Negotiating SSL session..
[R] SSL ERROR: unknown protocol
[R] Connection failed (Connection closed by client)
[R] Delaying for 45 seconds before reconnect attempt #1
[R] Retry attempt Aborted
[R] Connecting to ! -= drftpd =- -> IP=213.112.xxx.xxx PORT=2121
[R] Connected to ! -= drftpd =-
[R] 220 DrFTPD 1.1.4
http://drftpd.org
[R] AUTH SSL
[R] 234 AUTH SSL successfull
[R] Connected. Negotiating SSL session..
[R] error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version number
[R] Connection failed (Connection closed by client)
[R] Delaying for 55 seconds before reconnect attempt #1
Either one of those two popups every now and then. This has been discussed in drftpd forum as well i think and all that's been said this far is that it's the combination flash fxp 3/drftpd that makes this. I know lots of others with the exact same problem