Enhancements to Vista's security and installation process are causing extra work for security and disk . Meanwhile, a new graphics infrastructure such as the DirectX 10 API and Windows Presentation Foundation are creating headaches for .

Take Adobe. About a third of Adobe's software doesn't run on Vista today. Another half runs, but with some known issues ().

The company has released free Vista updates for some of its lower-priced consumer products, such as Photoshop Elements and Premiere Elements. It also plans to release free updates to Acrobat 8 and Reader 8 by the middle of the year.

But Adobe also has no plans to update existing versions of its pricey professional and prosumer products, such as Photoshop, InDesign, Dreamweaver, Flash and After Effects for Vista. Instead, it plans to issue new Vista-compatible upgrades within the next six months that will cost between US$100 and $200 for an upgrade, with full versions costing more.

Some products that Adobe was already planning to discontinue, such as PageMaker and Macromedia FreeHand, won't be ported to Vista at all.