Hi, I''m now trying to develop application for big files exchanges by Webserver and Browser with rails. There is a browser dependent file uploading problem with Rails. Uploading file is issued from .rhtml like this. <%= form_tag({:action => "upload_file"}, {:multipart => "true"}) %> With IE ( 6.02900 ) a 5 meg file was sent but slowly and it took more than 10 seconds. With FireFox the same file was sent in 3 seconds or so. With FireFox a 20 meg file was sent in 9 seconds. With IE the same file could not be sent. ( for 5 mins client and rails server gave no responses ) Firefox can send a 100Mbyte file. According to MS ( http://support.microsoft.com/kb/329781/en-us ), IE w/ modified registory ( 8kb -> 32 kb) can send a 100meg file but take looooong time. it seems that while uploading files, rails action "upload_file" was kept waiting, because there are no action log in the log file. my question is : Is there any way in Rails to receive a big file from popular browsers in stable and rapidly? I confirmed above in the following envs. Rails 1.1.2 webrick ( Ruby 1.8.4) lighttpd 1.4.11 Any suggestions, workarounds or alteratives will be really appreciated. Regards, -- Hiroshi Takagi <gollum@hi-net.zaq.ne.jp>