for everyone who is affected by this problem the easiest way i have found to some what change the problem with the greeting send page opening in the _parent window has been to edit the email template. it is not the best solution as it should I believe open in a pop up window .
admin/settings/email templates/ Greeting from the other member notification letter template.
open and copy and paste the code below
.<html><head></head><body style="font: 12px Verdana; color:#000000">
<p><b>Dear <RealName></b>,</p>
<p>We are glad to inform you that member <ProfileReference> sent you a greeting!</p>
<p>A greeting means that the member is interested in contacting you. Please, be polite and answer with your greeting in return. You can send it by merely following the link:<br />
<a target="_blank"<VKissLink>
</p></a>
<p><b>Thank you for using our services!</b></p>
<p>--</p>
<p style="font: bold 10px Verdana; color:red"><SiteName> mail delivery system!!!
<br />Auto-generated e-mail, please, do not reply!!!</p></body></html>
you can copy and paste the above code or if you have edited your email template just place the code in red and it will open the greeting page in new window so your users are not left with no way to get back to the mail inbox other than use the browser back button ..
happy thoughts