I would submit that no financial move Norwegian is pulling these days is "very common" -- their combination of rapid growth with new aircraft and a failing business model makes for some interesting financial accounting.

BTW, this is a few days old, but is a very interesting take on IAG's unusual interest in acquiring the company. Cranky thinks IAG is being very clever; the jury is still certainly out on this, but they're definitely thinking outside the box.

IAG Shows Its Smarts With Effort to Acquire Norwegian | Cranky Flier