Problem accessing a site

["Baird, Josh" <jbaird@xxxxxxxxxxx>]

Hi,

Our Squid 2.7 proxies are failing on a specific request:

Key        Value
Response            HTTP/1.0 400 Bad Request
Server   squid
Date      Wed, 28 Nov 2012 13:07:29 GMT
Content-Type    text/html
Content-Length                2144
Expires Wed, 28 Nov 2012 13:07:29 GMT
X-Squid-Error    ERR_INVALID_URL 0
X-Cache               MISS from proxy.corp.com
X-Cache-Lookup               NONE from proxy.corp.com:80
Via         1.0 proxy.corp.com:80 (squid)
Proxy-Connection           close

The request header is:

Key        Value
Request               GET http://api.copiamobile.com/marketing-api/msQuiz/markFeaturedQuizzes?callback=jQuery171017257169384743326_1354106706654&quizzes=%5B%7B%22quizId%22%3A1%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A2%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A3%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A4%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A5%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A6%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A7%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A8%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A9%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A10%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A11%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A12%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A13%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A14%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A15%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A16%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A17%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A18%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A19%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A20%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A21%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A22%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A23%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A24%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A25%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A26%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A27%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A28%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A29%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A30%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A31%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A32%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A33%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A34%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A35%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A36%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A37%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A38%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A39%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A45%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A46%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A47%2C%22featured%22%3Atrue%7D%2C%7B%22quizId%22%3A48%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A49%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A50%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A51%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A52%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A53%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A54%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A55%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A56%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A58%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A59%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A60%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A61%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A62%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A63%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A64%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A65%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A66%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A67%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A68%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A69%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A71%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A73%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A74%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A75%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A77%2C%22featured%22%3Atrue%7D%2C%7B%22quizId%22%3A81%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A85%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A87%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A88%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A90%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A91%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A92%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A93%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A98%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A99%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A100%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A102%2C%22featured%22%3Atrue%7D%2C%7B%22quizId%22%3A103%2C%22featured%22%3Atrue%7D%2C%7B%22quizId%22%3A104%2C%22featured%22%3Atrue%7D%2C%7B%22quizId%22%3A105%2C%22featured%22%3Atrue%7D%2C%7B%22quizId%22%3A106%2C%22featured%22%3Atrue%7D%2C%7B%22quizId%22%3A108%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A109%2C%22featured%22%3Afalse%7D%2C%7B%22quizId%22%3A110%2C%22featured%22%3Atrue%7D%5D&_=1354108049439 HTTP/1.1
X-Requested-With          XMLHttpRequest
Accept  text/javascript, application/javascript, application/ecmascript, application/x-ecmascript, */*; q=0.01
Referer                http://api.copiamobile.com/marketing-api/msQuiz/manage
Accept-Language             en-us
Accept-Encoding              gzip, deflate
User-Agent         Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host       api.copiamobile.com
Proxy-Connection           Keep-Alive
Cookie  JSESSIONID=7A7CFED8E9B918661B4554B64FCA0693

There is nothing logged in cache.log/access.log of any interest.  Could it be that the request is so long?  Any ideas on how to diagnose and fix this problem?  

Any advice is appreciated.

Thanks!