As the scramble to install Leopard spreads across the globe, we're learning more and more about what software works, and what doesn't, in Apple's eagerly awaited new operating system.

Lots of applications seem to work fine, though most developers are holding off on official statements of compatibility until they've had an opportunity to test their software with the final release version of Mac OS X 10.5, which most developers could first obtain last Friday, along with the rest of us.

A few applications have known problems running under Leopard, and the folks over at FileMaker, Inc. have posted an article in their knowledge base on FileMaker's compatibility with Leopard. The company says FileMaker Server 9 and FileMaker Server 9 Advanced don't currently "deploy properly on Leopard," and they're working on a compatibility update. FileMaker Pro 9 and FileMaker Pro 9 Advanced "generally run on Leopard," with two known issues:

• Instant web publishing doesn't work
• FileMaker only works if its language version matches the region set in the Mac's "International Formats Region" preference under System Preferences. (The English language version, for example, only works when the Mac is set to the United States region.)

The company says it has not tested versions of FileMaker prior to FileMaker 9 under Leopard, and has no plans to update earlier versions.