# Release notes for `checker-XXX` builds

#### checker-255

built: February 11, 2011
download: checker-255.tar.bz2

highlights:

- Mac OS X builds are now Intel `i386` and `x86_64` only (no `ppc` support)
- Turns on new `-init` method checker by default
- Reduces memory usage of analyzer by 10%
- Misc. fixes to reduce false positives on dead stores and idempotent operations.

#### checker-254

built: January 27, 2011
download: checker-254.tar.bz2

highlights:

- Introduces new `-init` method checker to check if a super class's init method is properly called.
- Objective-C retain/release checker now reasons about calls to property accessor methods (setter/getter).
- Introduces new attribute ns_consumes_self to educate the Objective-C retain/release checker about custom "init-like" methods that do not follow the standard Cocoa naming conventions.
- Introduces new attributes ns_consumed and cf_consumed to educate the Objective-C retain/release checker about methods/functions that decrement the reference count of a parameter.