Problem with filters

[Toni Thomä]

i´m getting a "curl: (56) Received problem 2 in the chunky parser"  
when i try to connect to the changes api with filters, like this: "https://HOST/DB/_changes?filter=app/important 
".

HTTP/1.1 500 Internal Server Error
Server: CouchDB/1.0.0 (Erlang OTP/R13B04)
Date: Sat, 04 Sep 2010 09:57:19 GMT
Content-Type: text/plain;charset=utf-8
Content-Length: 44
Cache-Control: must-revalidate
{"error":"unknown_error","reason":"badarg"}
curl: (56) Received problem 2 in the chunky parser



my filter design doc looks like this:
{
  "_id": "_design/app",:
  "_rev": "5-7e5f4602b5f4baa1f515e66f70249ed1",
  "filters": {
    "important": "function (doc, req) {if (doc.created_at) {return  
true;} else {return false;}}"
  }
}

same happens when try to load this query in safari/firefox

all other views are working.

i´m on cloudant (couchdb 1.0.0)

regards
toni