diff --git a/scheme/httpd/seval.scm b/scheme/httpd/seval.scm
index 27b1c88..d06bd13 100644
--- a/scheme/httpd/seval.scm
+++ b/scheme/httpd/seval.scm
@@ -115,10 +115,15 @@ The request's body must be form-url encoded and contain a \"program=<sexp>\" pai
 
 ;;; Read an HTTP request entity body from stdin. The Content-length:
 ;;; entity-header field of request REQ tells how many bytes this entity
-;;; is. The entity should be a URI-encoded form body. Pull out the
-;;;     program=<stuff>
-;;; string, extract <stuff>, uri-decode it, parse that into an s-expression,
-;;; and return it.
+;;; is. 
+
+;;; We assume, that the entity is "form-url encoded" data (see
+;;; parse-forms.scm for a description of this encoding). This
+;;; assumption is rather strange - it may safely be made only if
+;;; there's a "Content-type: application/x-www-form-urlencoded" header.
+
+;;; Pull out the program=<stuff> string, extract <stuff>, 
+;;; parse that into an s-expression, and return it.
 
 (define (read-request-sexp bytes iport)
   (let*