Yesterday, I upgrade my site with WP 2.3 to 2.7 and "BADABOUM in french" I have the commun problem : unable to upload image... the screen is blank after uploading... but the image file is well uploaded in my wp-content/uploads/2009/01 but without thumbnails and without any access or reference from administrator panel. (I just see it with my ftp program). The problem is the same with IE6 or Firefox
Today, I decide to change the upgrade mode :
I create in my site a new directory wp_2.7 and copy alls WP files (yesterday, I will copy all the WP files onto the old directories)
After that, I change in my database the option_value http://www.mysite/wp into db/table/field wp_options/siteurl to my new url http://www.mysite/wp_2.7
... and now, all is perfect !!! I can upload image, I see the screen with the result image, the different thumbnail possibilities, etc..
But I don't understand why ???