Apple released Aperture 3.4.5 on Wednesday, a maintenance release that fixes two bugs and brings unspecified "stability improvements." Aperture is Apple's professional photo management solution.
Apple's patch notes:
What's New in Version 3.4.5
- Addresses an issue that could cause Aperture to quit unexpectedly when deleting items from a camera or memory card after import
- Memory cards are now ejected correctly when using the Delete Items option after import
- Includes stability improvements
The update is 549MB through the Mac App Store. You can download the standalone installer from Apple's support site, where it's a 523.15MB download.