Still having HTTP 400 - nginx bad request error

[Asif Ali]

I recently updated nginx to 0.6.32 and I am still facing a HTTP 400 error
when I am making mobile requests. Can someone tell me what is the issue
please?

sample request

http://www.whatever.com/process?a=14131C047A5041424056405648574B588C89&ua=Mozilla%2F5.0+%28Windows%3B+U%3B+Windows+NT+5.1%3B+en-US%3B+rv%3A1.8.1.12%29+Gecko%2F20080201+Firefox%2F2.0.0.12&ip=220.227.173.195&key=sms,india,jokes,chat,romance,freesms
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