Rails - Jul 2008 - video uploading error with Safari Browser

Hi all,
In "New Video" page user enter the new video details and click
"Upload"
button the system is displaying error page with Safari Browser on
Windows machine.

Code :   - fold - unfold

   1. NoMethodError in ResourcesController #create_video
   2.
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\202&#65533;on\025!a\r&#65533;"&#65533;&#65533;&#65533;\r\201&#65533;&#65533;@/&#65533;&#65533;x\tP&#65533;&#65533;J\210&#1807;\025C&#65533;\(A\a\024&#65533;&#65533;&#65533;&#65533;\204&#65533;&#65533;&#65533;&#348;\aH\a\376\271\225&#65533;A&#65533;\232\204<&#2010;\020\211B&#65533;&#65533;;1@&#65533;...................so
on
   3. code:
   4. controller =>
   5. def create_video
   6.       params[:tag][:name] comma_seperated_tags(params[:tag][:name])
   7.       @video = Video.create_video(params[:video],
params[:thumbnail], params[:title], params[:tag][:name],
params[:category])
   8.       if @video
   9.         flash[:success_notice] = "Video uploaded successfully."
  10.       else
  11.         flash[:success_notice] = "Video uploading failed"
  12.       end
  13.       @categories = Category.find(:all)
  14.       render :action => :videos
  15.   end
  16.
  17. Model =>
  18.   def self.create_video(vid,thumbnail,title,tag, category)
  19.     if valid_video?(vid) && valid_thumbnail?(thumbnail)
  20.       video_filename = sanitize_attachment_name(vid)
  21.       thumbnail_filename = sanitize_attachment_name(thumbnail)
  22.       @video = self.new do |video|
  23.         video.title = title
  24.         video.video_name = video_filename
  25.         video.thumbnail_name = thumbnail_filename
  26.         video.category_id = category
  27.         video.tag_list = tag
  28.       end
  29.       self.upload_video(vid, video_filename, @video.id) &&
self.upload_thumbnail(thumbnail, thumbnail_filename, @video.id) if
@video.save
  30.     end
  31.      rescue
  32.       false
  33.   end
  34.
  35.   def self.valid_video?(attachment)
  36.     if attachment.kind_of? StringIO or attachment.kind_of?
Tempfile
  37.       true
  38.     else
  39.       false
  40.     end
  41.   end
  42.
  43.   def self.valid_thumbnail?(attachment)
  44.     if attachment.kind_of? StringIO or attachment.kind_of?
Tempfile
  45.       true
  46.     else
  47.       false
  48.     end
  49.   end
  50.
  51.   def self.sanitize_attachment_name(attachment)
  52.     File.basename(attachment.original_filename)
  53.   end
  54.
  55.   def self.upload_video(video, video_name, video_id)
  56.     video_path = VIDEO_UPLOAD_PATH + "#{video_id}_" + video_name
  57.     File.open(video_path, "wb") { |f| f.write(video.read) }
  58.   end
  59.
  60.   def self.upload_thumbnail(thumbnail, thumbnail_name, video_id)
  61.     thumbnail_path = THUMBNAIL_UPLOAD_PATH + "#{video_id}_" +
thumbnail_name
  62.     File.open(thumbnail_path, "wb") { |f|
f.write(thumbnail.read)
}
  63.   end

.........

The error was raising only with safari and works good with FF and IE

did any one have any idea with this issue
help me !!
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