Flash10:Upgrading from Flash9 (CS3) to Flash10 (CS4)

New Features Flash 11
The top new features introduced in Flash 11 are:
 * Text Layout Framework (TLF) - A new Text Engine giving greater control in line with other Adobe products such as InDesign or Illustrator.
 * Font Embedding has been simplified
 * Realistic Spring properties with the IK Bones tool
 * Code Snippets Panel - cut and paste or save your own
 * Improved Code Hinting
 * Greater ease of work flow between Flash and all other Adobe Products - Photoshop, InDesign, Illustrator, Flex and Catalyst
 * AIR (Adobe Integrated Runtime). Greater ease of developing desktop apps.
 * Packaged Applications for the iPhone

Issues when working with both CS4 AND CS5

 * Add any here !!

New Features Flash 10
The top new features introduced in Flash 10 as listed by Adobe (2009) are:
 * Object-based animation - apply tweens directly to objects instead of to keyframes
 * 3D transformation - Animate 2D objects through 3D space
 * Inverse kinematics with Bones tool - Create chain-like animation effects with a series of linked objects, or quickly distort a single shape using the new Bones tool.
 * Procedural modeling with Deco and Spray Brush - Turn symbols into instant design tools
 * Motion editor - detailed control over keyframe parameters, including rotation, size, scale, position, filters, and more
 * Metadata (XMP) support - Add metadata to SWF files using the new XMP panel
 * Motion presets - prebuilt animations that can be applied to any object

At the url ( http://www.adobe.com/products/flash/features/?view=topnew ), you will find demonstrations of the new features.