i have your answer.
1st install
opera_sl-5x00-7.30.9965_arm.ipk
2nd install
opera-cseries-fix_7.30_arm.ipk
third.
just because you installed these, it does not mean that you can bookmark since permissions are changed. in order for you to bookmark or save settings in opera, you need to change permissions for a certain directory.
change permission in /home/zaurus by
in the terminal
excuse my messy code but i hope some one can correct me
su
chown -R zaurus:qpe /home/zaurus/.opera
chmod 700 /home/zaurus/.opera
im not sure for the rest of the c3000 group but i works fine on my c1000. Reason it might be that you dont have the permissions to run it.
do my thing first and reboot it if you wish. then try opera and see if it works. If not, I have no clue since im not a c3000 owner.
to find the files, you need to search google. you will find them.