多用户的Movable Type 一般需要设置下上传文件的大小。

方法：
在mt-config.cgi中添加：

# When uploading files through Movable Type's upload mechanism, a ceiling

# is put on the size of the files that can be uploaded to prevent

# denial-of-service attacks. By default this setting is 1000000 (1MB).

CGIMaxUpload 700000