Author: bob[at]cakebox.net
[Added to the original trac issue at 4.23pm, Monday, 29th June 2009]

Are you sure you have the latest file from SVN? Note that http://svn.openstreetmap.org/applications/rendering/tilesAtHome is deprecated, the stable version is http://svn.openstreetmap.org/applications/rendering/tilesAtHome-dev/tags/Ulm

The line you are talking about is no longer at line 67, but at 75, and it's been changed to this:
if ( $line =~ m{(<path \s id="(?:way|area)_(\S+)" \s d=") # the prefix of the path

Reopen this ticket if updating to the latest version does not fix the problem.

Author: david[at]oxtract.se
[Added to the original trac issue at 7.52pm, Monday, 29th June 2009]

Ok, I get it now, this was not the file I found. There is another file here: http://svn.openstreetmap.org/applications/rendering/osmarender/osmAtHome/lines2curves.pl
maybe that should be removed if it is obsolete?
I have updated the wiki to point to the correct file (http://wiki.openstreetmap.org/wiki/Osmarender/BezierCurves).