Curious about what programs have been updated for Leopard? Look inside for a list of the important or interesting programs that specifically claim Leopard compatibility.

Back to My Mac can work with a little firewall configuration help, and Apple's provided some more detail that we explain how to use. Also, Apple confesses Back to My Mac's security weaknesses - at either end of the connection, not in the middle.

The transparent menu bar has fallen, a victim of hackers' ingenuity. Users, rejoice!

Frustrated by how Spaces uses meaningless document icons in the Dock? Rich Mogull points you to the solution.

Apple releases Mac OS X 10.5.1, the first update to Leopard, and fixes problems with Back to My Mac, Mail, and Finder data loss when moving files among partitions and networked volumes. It also makes one cosmetic change to the application firewall while fixing a problem that bit Skype users and adding more security.

With PGP installed, upgrading to Leopard can produce hard-to-pinpoint slowdowns, as I saw with a beta of email program Mailsmith. But uninstalling the software or upgrading to a Leopard-compatible beta solves the problem.

Apple touted Leopard's firewall as an improvement over Tiger, but security consultant Rich Mogull found significant problems with how it works and makes some suggestions for better security.

Spotlight on Leopard is so much better than Spotlight on Tiger, it could be a major reason for upgrading. It's full of power user tricks you might not realize are there - until you read this article, that is!

The Leopard installer is even better than the Tiger installer was. That's good news, but some oddities and frustrations remain. Perhaps I can interest you in a little book I wrote on the subject.

Leopard's new backup feature finally brings easy backups to the masses. But is it really all that? And when is that backups book of Joe's going to be updated, anyway?

Now that Mac OS X 10.5 Leopard is released, we're starting to see an expected set of updates and incompatibilities. Login and Keychain Update 1.0 corrects issues with accounts created in early versions of Mac OS X; the new Back to My Mac feature could allow someone with access to your .Mac account to take control of your machine; Apple warns Aperture users not to run the software while Time Machine is performing a backup; and a slew of compatibility updates are also available.

As Leopard rolls out around the world, we're hearing more and more about what third-party applications work, or don't, in the new Mac OS X. FileMaker, Inc. has posted an article in their knowledge base about known problems with FileMaker 9.

Leopard lets you share and share alike, offering your system up for remote viewing and control, as well as letting you take control of others' systems (with their permission). But Tiger can play nice, too, through built-in Mac OS X support and Chicken of the VNC.

Six things about Leopard I just can't stand. I've been dying to talk about these, and now I'm going to.

You'll be reading about Leopard in TidBITS for some time, but for significantly more detail about Apple's new operating system, check out the five ebooks we've just published - over 650 pages all told!