Author's note:
After troubleshooting via email, the issue above appeared to be caused by use of a malformed album shortcode (marking this thread as resolved).
For the community, there are three combinations of NextGEN shortcodes that will show an album...
1. [album id=x]
2. [album id=x template=compact]
3. [album id=x template=extend]
* where "x" equals your album ID number.
Cheers,
Mark.