Here it is a compatible wpa_supplicant for 2.3.5
tested and working with yp g70 2.3.5 and x10 mini 2.1 with barnacle.
Probably it works with symbian (joikuspot) and windows 6.5 wifi tethering
don’t forgot to backup your original wpa_supplicant file!!!
Transfer the wpa_supplicant file to your phone SD card.
Now copy wpa_supplicant file to /system/bin folder using root explorer (select R/W read and write)
reboot and test it!