Version:            (using KDE 4.3.2)
OS:                Linux
Installed from:    Archlinux Packages

To be more precise, once the tab opens in konqueror the URL is requested from the web server twice. I noticed this when I couldn't make a password reset link work on a web application I'm developing. I noticed the reset URL is being loaded twice, and the second time it loads it no longer works to gain access to the account by design. Here are the logs from the web application so you can see the behavior:

Processing UsersController#activate (for <removed> at 2009-10-23 17:16:31) [GET]
  Parameters: {"id"=>"2", "code"=>"9442220b810ca7d32309ae5c00c9e9b79363f698"}       
  User Load (0.2ms)   SELECT * FROM `users` WHERE (`users`.`id` = 2)                
  CACHE (0.0ms)   SELECT * FROM `users` WHERE (`users`.`id` = 2)                    
  SQL (0.1ms)   BEGIN                                                               
  User Load (0.3ms)   SELECT `users`.id FROM `users` WHERE (`users`.`username` = BINARY 'example' AND `users`.id <> 2) LIMIT 1
  User Update (0.3ms)   UPDATE `users` SET `activation_key` = NULL, `updated_at` = '2009-10-23 21:16:31' WHERE `id` = 2          
  SQL (15.8ms)   COMMIT                                                                                                          
Redirected to http://<removed>/users/2/edit                                                                              
Completed in 21ms (DB: 35) | 302 Found [http://<removed>/users/2/activate/9442220b810ca7d32309ae5c00c9e9b79363f698]      


Processing UsersController#edit (for <removed> at 2009-10-23 17:16:32) [GET]
  Parameters: {"id"=>"2"}                                                       
  User Load (0.2ms)   SELECT * FROM `users` WHERE (`users`.`id` = 2)            
  CACHE (0.0ms)   SELECT * FROM `users` WHERE (`users`.`id` = 2)                
Rendering template within layouts/application                                   
Rendering users/edit                                                            
Rendered admin/_index (0.6ms)                                                   
Rendered layouts/_admin (1.2ms)                                                 
  Page Load (0.4ms)   SELECT * FROM `pages` WHERE (`pages`.`group` = 'users' AND `pages`.`name` = 'edit_2') LIMIT 1
  Revision Load (0.2ms)   SELECT * FROM `revisions` WHERE (`revisions`.`id` = 346)                                 
  Fragment Load (0.6ms)   SELECT * FROM `fragments` WHERE (`fragments`.revision_id = 346)                          
Completed in 12ms (View: 9, DB: 5) | 200 OK [http://<removed>/users/2/edit]                                


Processing UsersController#activate (for <removed> at 2009-10-23 17:16:33) [GET]
  Parameters: {"id"=>"2", "code"=>"9442220b810ca7d32309ae5c00c9e9b79363f698"}       
  User Load (0.2ms)   SELECT * FROM `users` WHERE (`users`.`id` = 2)                
  CACHE (0.0ms)   SELECT * FROM `users` WHERE (`users`.`id` = 2)                    

After here is fails as the activation key was removed the first go around.

The process is: activation url logs user in and redirects to user account edit url, but before you even get a chance to see the edit url the activation url is loaded again in the same tab, and the user is logged out.

I'm opening this in kmail as this does not happen of I copy the link address from the e-mail and paste it into konqueror. It only happens if I click on the URL directly in kmail.