"Create Package from this Bottle" fails with no error message
If you're trying to create an rpm package out of a bottle in the Manage Bottles>Advanced tab and the operation appears to run for a bit before dying, you're probably missing rpm-build. You can easily install this package via
$ sudo yum install rpm-build
Be sure to get the 32-bit rpm-build libs, if you're using a 64-bit distro.
When this install is complete, try again. If the package creation operation runs for a good bit longer than it used to before dying, this is a good sign. Depending on the size of your bottle, package creation can take up to several minutes.