This fix is for Atahualpa version 3.5.1 and 3.5.2
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DESCRIPTION: In some cases, when using the Atahualpa 'Configure EXCERPTS' options, setting 'Posts or excerpts on HOME page?' to 'Only Excerpts' and setting 'Show the first X posts on HOME page as full posts?' to a number greater than 0 will result in only excerpts being displayed on the blog page.

CAUSE: This is caused because an assignment was accidently coded as a comparison

FIX: edit index.php and change line 8 from

if (have_posts()) : $bfa_ata['postcount'] == 0; /* Postcount needed for option "XX first posts full posts, rest excerpts" */ ?>

to

if (have_posts()) : $bfa_ata['postcount'] = 0; /* Postcount needed for option "XX first posts full posts, rest excerpts" */ ?>

(changing the '==' to an '=')

reference: http://forum.bytesforall.com/showthread.php?t=7316

The attached file has the fix incorporated into it FOR 3.5.1 ONLY index.php.zip