Apple has released Aperture 1.5.2, which provides reliability and performance improvements.

These improvements affect keywords, the Loupe, cropping, previews, metadata presets, file renaming, iPhoto library import and watermarks. Apple recommends all Aperture users should install the update.

The company also recommends users install Apple's Digital Camera RAW Support Update 1.0.1, which adds support for Raw files captured by the Canon Rebel XTi/400D, Nikon D80 and Pentax *ist DS.