diff --git a/linkcheck/checker/__init__.py b/linkcheck/checker/__init__.py
index a859162c..d8bcb9d6 100644
--- a/linkcheck/checker/__init__.py
+++ b/linkcheck/checker/__init__.py
@@ -101,12 +101,13 @@ def get_url_from (base_url, recursion_level, aggregate,
         base_ref = strformat.unicode_safe(base_ref)
     name = strformat.unicode_safe(name)
     url = absolute_url(base_url_stripped, base_ref, parent_url).lower()
-    scheme = None
-    if not (url or name):
-        # use filename as base url, with slash as path seperator
-        name = base_url.replace("\\", "/")
-    elif ":" in url:
+    if ":" in url:
         scheme = url.split(":", 1)[0].lower()
+    else:
+        scheme = None
+        if not (url or name):
+            # use filename as base url, with slash as path seperator
+            name = base_url.replace("\\", "/")
     allowed_schemes = aggregate.config["allowedschemes"]
     # ignore local PHP files with execution directives
     local_php = (parent_content_type == 'application/x-httpd-php' and
diff --git a/linkcheck/htmlutil/linkparse.py b/linkcheck/htmlutil/linkparse.py
index 3196d0a5..adb4f347 100644
--- a/linkcheck/htmlutil/linkparse.py
+++ b/linkcheck/htmlutil/linkparse.py
@@ -275,9 +275,6 @@ class LinkFinder (TagFinder):
             urls.extend(url.split(u','))
         else:
             urls.append(url)
-        if not urls:
-            # no url found
-            return
         for u in urls:
             assert isinstance(u, unicode) or u is None, repr(u)
             log.debug(LOG_CHECK, u"LinkParser found link %r %r %r %r %r", tag, attr, u, name, base)
diff --git a/scripts/nodebug.sh b/scripts/nodebug.sh
new file mode 100755
index 00000000..fb42f714
--- /dev/null
+++ b/scripts/nodebug.sh
@@ -0,0 +1,8 @@
+#!/bin/sh
+# deactivate all debug calls
+set -e
+set -u
+
+d=$(dirname $0)
+base=$(readlink -f $d/..)
+find "$base" -type f -print0 | xargs -0 sed -i 's/  log.debug(/  #log.debug(/g'
diff --git a/scripts/viewprof.py b/scripts/viewprof.py
old mode 100644
new mode 100755