addslashes filter doesn't escape backslashes. This is important when you want to pass a string that contains backslashes to a JavaScript? template.
Here's a patch:
Index: django/template/defaultfilters.py
===================================================================
--- django/template/defaultfilters.py (revision 3496)
+++ django/template/defaultfilters.py (working copy)
@@ -15,7 +15,7 @@
def addslashes(value):
"Adds slashes - useful for passing strings to JavaScript, for example."
- return value.replace('"', '\\"').replace("'", "\\'")
+ return value.replace('\\', '\\\\').replace('"', '\\"').replace("'", "\\'")
def capfirst(value):
"Capitalizes the first character of the value"
