Hi - my question might sound obvious (obviously "Rebuild all" rebuilds all!) but I'm curious. I have some cards that don't seem to be acting as they should when I click on parts of a show.

Does "rebuild all" essentially go through and just fix files/shows? Or does it just start to download my entire collection? I'd like to have some sense of what it's for before clicking on it! This forum has been really helpful, so I thought I'd try here first and tap into some of this vast knowledge here! Thanks.

@cxsn, this is not so simple actually. Basically yes, this is an option for fixing files and shows, but as every case is different, you should have to know first, what exactly you are going to fix. Sometimes it is necessary to find and remove the damaged files first, before you're going to "rebuild" them, some times not, sometimes you don't have to use this option at all to fix something... as I said, it's individual and should be discussed in Bugs & Fixes topic.

No this option will not start downloading your collection, when it's downloaded already. If you have some probs with your private shows, there is also a possibility to "update" them, if something is wrong. In "My collection" on your software right click on "trash can" gives you "Check for updates" for every card. Sometimes a very useful option to get things working again...

VG keeps track of all the Clips in your collection in several different files.
Think of these files as your collection database.
They don't hold the actual Animations, but they hold information about what clips are downloaded, what clips you have the rights to play, what Demo's are on your carousel

Rebuild All, tells VG to Re-download the Rights from the server, and to Verify that the Clips are actually present in the folders, and updates the Database accordingly.
It also used to Reset the Demo's rotation back to the very beginning.
(I don't know if it still does this or not)

Sometimes the GUI, Downloader, and the Database can get out of sync.
The GUI thinks a card is Downloaded, but it's not written to the database.
The Downloader attempts to download the same card and gets stuck, and the rest of your downloads sit there waiting..

To Fix that type of trouble.
You locate the Stuck Download and delete it.
Then you Rebuild all, so it's all synced back the way it should be.

If you have the Automatic Download check marks checked, this could also result in cards beginning to download. ( ones that haven't been downloaded yet)

Also Keep in mind that the P2P download process is Different from the Server Download process.

P2P will make a place holder that has the same name and size as the Fully downloaded file.
As P2P makes connections, it gets small pieces from different sources and fills in this place holder.
Sort of like building a puzzle one small piece at a time.

The Server side Download Builds the File in a continuous stream from start to finish.
So as the file is downloaded the file size increases a little at a time.
It has a temporary file name, until it is fully downloaded, then it is renamed.

Thanks for both of the great answers.
@MrBeeCeeper: I'll be sure to keep specific problems to Bugs & Fixes, but this was more about my curiosity. Thanks again!