Systems Management

I am building a script to automatically perform all the steps required to get an MSI into an SCCM collection. The script uses the name of the MSI's parent folder for things like the package name and program name and also the collection name. However, my test MSI's name is prefixed with an underscore (purely to make it easy to find!). While I can see the collection in the various reports, it doesn't appear in the console, in spite of innumerable refreshes of the view. Is underscore a disallowed character for collection names?

EDIT
Underscore is NOT a disallowed character: I just created a collection the long way with a leading underscore.

EDIT
Easy, really...
My code to add the collection to its parent was failing. Consequently, th econsole obviously couldn't work out where in the "tree" the collection belonged.