--- a/bitten/__init__.py
+++ b/bitten/__init__.py
@@ -19,4 +19,4 @@
         pass
 
 # The master-slave protocol/configuration version
-PROTOCOL_VERSION = 2
+PROTOCOL_VERSION = 3

--- a/bitten/build/pythontools.py
+++ b/bitten/build/pythontools.py
@@ -399,6 +399,8 @@
         modname = base.replace(os.path.sep, '.')
         realfilename = ctxt.resolve(filename)
         interesting_lines = get_lines(open(realfilename))
+        if not interesting_lines:
+            continue
         covered_lines = coverage_data.get(realfilename, set())
         percentage = int(round(len(covered_lines) * 100 / len(interesting_lines)))
         line_hits = []

--- a/bitten/slave.py
+++ b/bitten/slave.py
@@ -169,9 +169,8 @@
                                         ).startswith('text/plain'):
                     content = e.read()
                 else:
-                    content = 'no message available'
-                log.debug('Server returned error %d: %s (%s)',
-                                        e.code, e.msg, content)
+                    content = 'Unknown cause of error'
+                e.msg = '%s (%s)' % (e.msg, content)
                 raise
             return e
 

--- a/doc/configure.txt
+++ b/doc/configure.txt
@@ -40,6 +40,8 @@
 :`version`:   The operating system version.
 :`machine`:   The hardware platform (for example “i686” or “Power Macintosh”).
 :`processor`: The processor architecture (for example “athlon” or “powerpc”).
+:`name`:      The name of the slave.
+:`ipnr`:      The IP address of the slave.
 
 Note that not all of these properties may be available for all platforms,
 depending on OS and Python version.