Hi, i can reproduce this issue with the latest Jessie release. Wifi hardware is an ipw2200 in this case. During installation I can not connect to a WPA secured network. I just get into an endless loop asking for the SSID and key. A connection to an open network works well. In the installer log i can see the following entries which might be interesting for this issue:
netcfg: INFO: Network chosen: FOO. Proceeding to connect. apt-install: Queueing package wpasupplicant for later installation netcfg: INFO: Couldn't connect to wpasupplicant dnesg says that the firmware ipw2200-bss.fw has been loaded. Will there be an update to the installer for Jessie? Kind regards Kay