On a MediaWiki 1.17alpha (r78549), PHP 5.2.13 (apache2handler), MySQL 5.1.44-community a file with 62 MB could not be uploaded while the parameters in LocalSettings have been set to $wgMaxUploadSize = '150M'; and php.ini post_max_size = 150M, upload_max_filesize = 150M. The Special:Upload message is ''This file is bigger than the server is configured to allow.''
The same file have been uploaded on a MediaWiki 1.16.0, PHP 5.2.13 (apache2handler), MySQL 5.1.44-community with the same LocalSettings and php.ini settings.
Cheers
Version: 1.17.x
Severity: normal
OS: Windows Vista