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Packet loss or slow performance detected when accessing any remote FTP server through a SonicWall NSA 240 firewall

Packet loss or slow performance may be detected when accessing any remote FTP server through a SonicWall NSA 240 firewall. During the loss, the Sonicwall's log will display an entry similar to the following:
‘Debug - Network Access - Out-of-order command packet dropped - xxx.xxx.xxx.xxx, 21, X1, ip-xxx-xxx-xxx-xxx.ip.xxxxxxxxxx.net - 192.xxx.xxx.xxx, 38128, X0 –‘

To resolve this, enable (its disabled by default) the setting "Enforce strict TCP compliance with RFC 793 and RFC 1122" on the SonicWall interface.