well, just to update:
i tried deactivating each plugin separately and rechecking the feed at:
http://cbtisrael.co.il/tips-blog/feed/
each time i still saw the same limited output. i tried switching the theme momentarily to twenty twelve, but still got the same output:
=================
This XML file does not appear to have any style information associated with it. The document tree is shown below.
<rss xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:sy="http://purl.org/rss/1.0/modules/syndication/" version="2.0">
<channel>
<title>Comments on: בלוג</title>
<atom:link href="http://cbtisrael.co.il/tips-blog/feed/" rel="self" type="application/rss+xml"/>
<link>http://cbtisrael.co.il</link>
<description>מכון CBT</description>
<lastBuildDate>Fri, 12 Jul 2013 07:47:36 +0000</lastBuildDate>
<sy:updatePeriod>hourly</sy:updatePeriod>
<sy:updateFrequency>1</sy:updateFrequency>
<generator>http://wordpress.org/?v=3.5.1</generator>
</channel>
</rss>