Did my portfolio data just disappear?

There are two potential issues here:

1. Some types of security were not moved over to the new portfolio. Most notably mutual funds. More on that here.
2. There is a bug in the portfolio that hides your securities. More details on that bug below:

When in the "Snapshot" view of the portfolio you will see the option to change pages to view more than the first 25 entries:

If you click over to page 2 you will notice the count of total portfolios is now wrong and that the Bullboards and News links on the second page do not work:

And when you switch back to page 1 it appears that all entries past 25 have been deleted:

Screencast demonstrating the bug and workaround: http://screencast.com/t/vlP9bf347dzr

Don't worry your data is still there. We are working with the software provider to resolve this issue and in the meantime you can simply refresh that portfolio page by moving to another portfolio and back or reloading the webpage. Watch the video to see how.