I've been trying to access the archive page to download an earlier version of zenphoto but have been recieving the following error message:

Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE in /home/www/zenphoto/zp-core/template-functions.php(4496) : eval()'d code on line 2

Thanks, a typo sneaked in somehow. Fixed now. Note we don't recommend to download older versions than 1.4.1.6 (see the security articles) as we cannot provide support for older versions.