ok, done both and heres the new error:

WARNING: The following packages cannot be authenticated!
opera-mobile
Install these packages without verification [y/N]? y
Get:1 http://deb.opera.com fremantle/non-free opera-mobile 10alpha~fremantle1 [6681kB]
Fetched 6681kB in 1min1s (109kB/s)
dpkg: parse error, in file `/var/lib/dpkg/available' near line 4912 package `kernel-power-flasher':
EOF during value of field `Maemo-Icon-26' (missing final newline)