Wikimedia Bugzilla is closed!

Clean setup with Postgresql-8.1.9, php-5.2.2

To reproduce:  As a superuser, using Mediawiki, upload an image.  Then try to update the image, either by clicking "Upload" again and specifying a file with the same name, or by going to the image's wiki page and clicking on "Upload a new version of the file".  The following error is generated:

Warning: pg_query() [function.pg-query]: Query failed: ERROR: duplicate key violates unique constraint "image_pkey" in /var/www/localhost/htdocs/pivotwiki/includes/DatabasePostgres.php on line 381
Internal error

A database error has occurred Query: INSERT INTO image (img_name,img_size,img_width,img_height,img_bits,img_media_type,img_major_mime,img_minor_mime,img_timestamp,img_description,img_user,img_user_text,img_metadata) VALUES ('Logo_blk_on_wht.gif','3801','140','72','8','BITMAP','image','gif','2007-07-17 23:44:17 GMT','','1','Jtosburn','a:0:{}') Function: Image::recordUpload Error: 1 ERROR: duplicate key violates unique constraint "image_pkey"

Backtrace:

#0 /var/www/localhost/htdocs/pivotwiki/includes/Database.php(651): DatabasePostgres->reportQueryError('ERROR: duplica...', 1, 'INSERT INTO im...', 'Image::recordUp...', false)
#1 /var/www/localhost/htdocs/pivotwiki/includes/Database.php(1251): Database->query('INSERT INTO im...', 'Image::recordUp...')
#2 /var/www/localhost/htdocs/pivotwiki/includes/DatabasePostgres.php(498): Database->insert('image', Array, 'Image::recordUp...', Array)
#3 /var/www/localhost/htdocs/pivotwiki/includes/Image.php(1605): DatabasePostgres->insert('image', Array, 'Image::recordUp...', 'IGNORE')
#4 /var/www/localhost/htdocs/pivotwiki/includes/SpecialUpload.php(434): Image->recordUpload('20070717234417!...', '', '', '', '', false)
#5 /var/www/localhost/htdocs/pivotwiki/includes/SpecialUpload.php(234): UploadForm->processUpload()
#6 /var/www/localhost/htdocs/pivotwiki/includes/SpecialUpload.php(15): UploadForm->execute()
#7 /var/www/localhost/htdocs/pivotwiki/includes/SpecialPage.php(522): wfSpecialUpload(NULL, Object(SpecialPage))
#8 /var/www/localhost/htdocs/pivotwiki/includes/SpecialPage.php(391): SpecialPage->execute(NULL)
#9 /var/www/localhost/htdocs/pivotwiki/includes/Wiki.php(156): SpecialPage::executePath(Object(Title))
#10 /var/www/localhost/htdocs/pivotwiki/includes/Wiki.php(47): MediaWiki->initializeSpecialCases(Object(Title), Object(OutputPage), Object(WebRequest))
#11 /var/www/localhost/htdocs/pivotwiki/index.php(47): MediaWiki->initialize(Object(Title), Object(OutputPage), Object(User), Object(WebRequest))
#12 {main}