There is improper or inadequate detail in this content.

If this is a map, it could mean a problem with the lighting, texturing, geometry, or layout; try the Cube Wiki for tips on using the engine. Should it be some other form of content, then it may need to be elaborated upon to be worth something.

Files in this content are improperly packaged or presented.

Refer to the Packaging Guide for information on how to fix this.

The screenshot for this content is either missing, improperly captured, has incorrect dimensions, or poorly depicts the content.

Screenshots let people get a feel for your work, and is the most important part of a node. They should be the correct size, and have no heads up display elements. Refer to the User's Guide for information on how to fix this.