Limit on number of items in lookup column dropdown list when attaching content types to document libraries

I've got a content type attached to a document library that includes a lookup column that references a list of active projects. The idea is that anyone creating a new document in the library needs to specify the project # of the project the document pertains to.

It appears that the dropdown list that appears at the top of the Word document only displays the first 开发者_Go百科100 items from the active projects list however. Does anyone know if this is a known issue with SharePoint 2007? I am not seeing this problem when using the same lookup column in lists as opposed to content types.

Regards.