[IE6/IE7 only] Incorrect requests being dropped

When running the zkdemo for a while after tens of users, we occasionally saw some incorrect request that causes the server failed to parse the paramters. The following is some log.

I looks like content-length doesn't match the request body. The real cause unknown (is it IE bug?).

>>>Sat Mar 29 22:36:21 CDT 2008
requestURL: http://www.zkoss.org/zkdemo/zkau
content-length: 114, header said 114
content-type: application/x-www-form-urlencoded;charset=UTF-8
method: POST
use inputstream/reader/secure: false,false,false
user-agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)
authType: null
params: []
64 74 69 64 3d 67 6a 66 36 31 26 63 6d 64 2e 30
3d 6f 6e 4d 61 70 4d 6f 76 65 26 75 75 69 64 2e
30 3d 7a 5f 6a 66 5f 34 30 37 26 64 61 74 61 2e
30 3d 33 37 2e 34 32 38 36 36 30 35 30 32 30 31
31 39 31 35 26 64 61 74 61 2e 30 3d 2d 31 32 32
2e 31 32 30 34 36 31 34 36 33 39 32 38 32 32 31
32 32 2e 31 33 37 34 35 35 39 34 30 32 34 36 35
38 74
dtid=gjf61&cmd.0=onMapMove&uuid.0=z_jf_407&data.0=37.428660502011915&data.0=-122.12046146392822122.13745594024658t
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