JSI Tip 8574. You cannot post any data to non-NTLM authenticated Web site after you visit one that is NTLM authenticated?

NOTE: The subject behavior has been corrected by the latest service pack for some operating systems.

If you experience the subject behavior:

1. Close all instances of Internet Explorer:

2. Copy / Paste the following into an empty Notepad.exe window:

REGEDIT4

[HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionInternet Settings]
"EnableNegotiate"=dword:00000000
"DisableNTLMPreAuth"=dword:00000001

3. Save the file as "%TEMP%TEMP.TMP".

4. Open a CMD.EXE window and type the following:

regedit /s "%TEMP%TEMP.TMP".