i have this same issue, 1.7 and 1.7.

PHP Version 5.3.6

i have disabled all other plugins. It is a fresh install.

I fixed my issue, a quick session of turning on site debug inside global configuration, and navigating to the page showed this.

# /home/content/97/8538497/html/plugins/editors/rokpad/rokpad.php

SAVE="SAVE"
SEARCH="SEARCH"
SETTINGS="SETTINGS"

which made me say "oh crap rokpad.php is from my template" turned off the plugin and it works.

I know this is an old post but I just had to THANK YOU! I am running a new install of CB 1.7.1 on Joomla 1.7.3 stable and was tearing my hair out because I could not get the save button to work in the CB administrator and could not find anything close to helpful in terms of a fix despite a lot of people apparantly having this issue. I saw your post, turned off my text editor and set it to none and voila! Thanks so much!

I have also the same bug in my joomla website details are below:
Joomla version :1.7.3
Community Builder Version:1.7

Also I had done the migration from joomla 1.6 to joomla 1.7.3 during the development process. Earlier it seems to be working fine but now it is not working.

Thanks in advance!