Omri,
I just got into your site. Please check your he_IL.com_jfbconnect.ini file as I had to cut and paste a few things, and likely messed up a few strings.
As for the issue, I honestly don't know why the language file wasn't being read from the Hebrew language file. If I switched the site's language to "English / en_GB", the string was properly working. Are you using anything else for translation on the site, other than Joomla's built in functionality? I couldn't see anything, but might have missed it.
Either way, I made the following code change to bypass the language file for that string, for now. Hopefully that's an acceptable solution until we find the real cause.
In /components/com_jfbconnect/libraries/facebook.php around line 300 was (Just search for "COM_JFBCONNECT_LOGIN_USING_FACEBOOK):
return '<fb:login-button v="2" size="' . $buttonSize . '" ' . $perms . ' onlogin="javascript:jfbc.login.login_button_click();">' . JText::_('COM_JFBCONNECT_LOGIN_USING_FACEBOOK') . '</fb:login-button>';I changed this to:
return '<fb:login-button v="2" size="' . $buttonSize . '" ' . $perms . ' onlogin="javascript:jfbc.login.login_button_click();">Facebook</fb:login-button>';
Obviously, that's not the perfect solution, but like I said, we've never seen this and we do a lot of multi-lingual testing and are used on many, many multi-lingual sites.
Thanks,
Alex