As it turns out, there are quite a few issues being addressed by Adobe Systems, Inc. with the release of the latest Mac OS X v10.5, a.k.a. Leopard.
The company has posted a compatibility statement on the matter and the 6-page, 120KB PDF may be downloaded from their site.
In effect, the statement says most Adobe applications work like a dream under Leopard but there are some itty-bitty issues with a few of them. It is to be expected with every new release of any operating system.
Acrobat 8, Premiere Pro CS3, After Effects CS3 Professional, Encore CS3, and Soundbooth CS3 have niggling issues (and there are reports that Lightroom 1.2 has a few problems too) but Adobe is working overtime to come up with updates in a few days.