Still no good news for BlackBerry users in Europe, Asia, Brazil, Chile, Argentina and parts of Africa that have been without service for the better part of two days now, but at least RIM's identified the problem — in statement to Pocket-lint, the company said that the problems were caused by a "core switch failure" that didn't kick over to its backup as planned. The result has been a "large backlog" of messages and data that needs to be cleared, but RIM still hasn't committed to a time frame for full service restoration. We'll let you know as soon as we hear anything.