I am having similer problems with http get. My %HTTPD returns empty,
and %HTTPR contains the 400 error. I ran a wireshark capture, where I
saw tasker using a post rather then a get. If I use the same url in
the browser, it completes successfully, with get/post being the only
noticible difference in the capture.
My http get contains only
192.168.1.56:8080/remote/processKey?
key=poweroff in the Server:Port. It is a remote command for my directv
reciever box. Tasker is the market version 1.2