Index: deluge/error.py
===================================================================
--- deluge/error.py     (revision 2758)
+++ deluge/error.py     (working copy)
@@ -31,6 +31,8 @@
 #    this exception statement from your version. If you delete this exception
 #    statement from all source files in the program, then also delete it here.

+import deluge.xmlrpclib
+
 class DelugeError(Exception):
     def __init__(self, value):
         self.value = value
@@ -40,3 +42,14 @@
 class NoCoreError(DelugeError):
     pass

+class InvalidTorrent(DelugeError):
+    pass
+
+def from_xmlrpc_fault(fault):
+    prefix = "deluge.error."
+    string = fault.faultString
+    string = string.replace(':', '(', 1) + ')'
+    if string[:len(prefix)] == prefix:
+        raise eval(string)
+    pass
+