I also can't see any caches on the map. "Live HTTP headers" (Firefox-Addon) reports lots of lots of 404 errors.
For example:
http://www.geocaching.com/map/map.png?x=4337&y=2696&z=13&k=rcJA&stxxx&ep=1
GET /map/map.png?x=4337&y=2696&z=13&k=rcJA&st=xxx&ep=1 HTTP/1.1
Host: www.geocaching.com
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:13.0) Gecko/20100101 Firefox/13.0.1
Accept: image/png,image/*;q=0.8,*/*;q=0.5
Accept-Language: de-de,de;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive
Referer: http://www.geocaching.com/map/default.aspx?lat=52.269967&lng=10.515
Cookie: __qca=xxx; __utma=54847549.1102568546.1266001023.1297781734.1310420332.15; BMItemsPerPage=20; company_history=%5B%5B%22http%3A//feedback.geocaching.com/geocaching%22%2C%22Geocaching%22%5D%5D; __unam=94cecf7-1300742f29a-16c118d1-7; userid=xxx; ASP.NET_SessionId=xxx
Pragma: no-cache
Cache-Control: no-cache
HTTP/1.1 404 Not Found
Cache-Control: private
Content-Length: 10009
Content-Type: text/html; charset=utf-8
Server: Microsoft-IIS/7.5
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
Date: Mon, 02 Jul 2012 21:00:43 GMT
Vary: Accept-Encoding, User-Agent
Content-Encoding: gzip
Connection: Keep-Alive
Fix this please!
