Apple has updated Logic Pro to version 9.1.1.
They say that the update improves overall stability, provides numerous fixes and enhancements, and is recommended for all users of Logic Pro 9..
Issues addressed with 9.1.1 include:
Improved stability of the 32-Bit Audio Unit Bridge
Compatibility with Novation's Automap feature in 64-bit mode.
Compatibility with Euphonix Eucon protocol in 64-bit mode.
Pricing and Availability:
Free update for registered users