I have this exact same issue using a Linksys wpc11 ver .4 (r818x module). Worked fine on 6.10 but after clean install of 7.04 my ESSID was being truncated by one character as described. I am not using gui tools to configure my wireless adapter I am directly editing /etc/network/interfaces. My wireless-tool is at version 28-1ubuntu3.
I have this exact same issue using a Linksys wpc11 ver .4 (r818x module). Worked fine on 6.10 but after clean install of 7.04 my ESSID was being truncated by one character as described. I am not using gui tools to configure my wireless adapter I am directly editing /etc/network/ interfaces. My wireless-tool is at version 28-1ubuntu3.