--- a/mercurial/ui.py
+++ b/mercurial/ui.py
@@ -237,7 +237,7 @@ class ui(object):
             try:
                 func = getattr(cdata, funcname)
                 return func(section, name)
-            except ConfigParser.InterpolationError, inst:
+            except (ConfigParser.InterpolationError, ValueError), inst:
                 msg = _("Error in configuration section [%s] "
                         "parameter '%s':\n%s") % (section, name, inst)
                 if abort:

--- a/tests/test-ui-config
+++ b/tests/test-ui-config
@@ -34,8 +34,8 @@ print repr(testui.config('values', 'unkn
 print "---"
 try:
     print repr(testui.configbool('values', 'string'))
-except ValueError, why:
-    print why
+except util.Abort, inst:
+    print inst
 print repr(testui.configbool('values', 'bool1'))
 print repr(testui.configbool('values', 'bool2'))
 print repr(testui.configbool('values', 'bool2', True))

--- a/tests/test-ui-config.out
+++ b/tests/test-ui-config.out
@@ -8,6 +8,7 @@ Error in configuration section [interpol
 'false'
 None
 ---
+Error in configuration section [values] parameter 'string':
 Not a boolean: string value
 True
 False