For certain lengths of HTTP_COOKIE, it seems that SSI regexes (in "expr="
statements) fail to capture the full length of the HTTP_COOKIE variable when
using capturing parentheses.  Here's an example, tested on 2.0.52 on two
different Linux servers:


<!--#set var="HTTP_COOKIE"
value="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=n"
-->

Your HTTP_COOKIE is:

"<!--#echo var="HTTP_COOKIE" -->"

<!--#if expr="$HTTP_COOKIE = /(.+)/" -->
...but captured from a regex using (.+), it's truncated to this:

"<!--#echo var="1" -->"
<!--#endif -->


In case this form/webpage messes with that code, just visit this URL:

http://nodivisions.com/test.shtml

Note that the actual value of HTTP_COOKIE doesn't matter; I found this bug while
using 3 real cookie values in it, but then replaced them with all Xes to test. 
Only the length seems to matter.