• All of the sudden, scrolling in the Asset Library is extremely slow ?

There seems to be a current QT bug, that happens after you switch to text mode and back to icon mode. Once this happens, you can either close the panel and launch it again, or hold ctrl while you are scrolling with the mouse wheel.

• I have lots of photoshop files, but their thumbnails are not showing up ?

Unfortunately, the icp tool from Houdini does not support .psd files. Its been reported and hopefully will be fixed at some point in time.

• I am trying to make thumbnails, but they are all blank ?

You most likely have your network pane's linked. Please unlink them for when you are making thumbnails and they should generate properly.

• Its making thumbnails for my images, but not any of the geometry ?

Make sure you have a Scene View open. Its required for the thumbnails to be saved.

• I moved to a new computer but all my thumbnails are gone for the items ?

As long as the items, are in the same path, and you also copied the Thumbnail folder, you should see the same Icons. The Icon name itself, is built on the path the asset has on disk, so as long as they match on your new computer, you should be fine.

• I am getting "Thumbnail Directory does not exist ? What's going on ?

Make sure you have the thumbnail directory specified in the Folder Management Tab.