Enhancements / Additions:

• A new capability to generate quadrilateral surface meshes using an algebraic structured surface mesh algorithm has been added.  Various distribution functions can be applied to control the edge grid distribution.
• A composite edge capability has been added.  A composite edge is a collection of edges that, for grid generation purposes, are treated as a single topological edge.  Composite edges can be used in situations where very small edges restrict the triangle/quadrilateral size.  Small edges can be combined with adjacent edges to create a longer composite edge that results in a more uniform edge grid distribution and better surface grid quality.
• When deleting a trimmed surface, the resulting untrimmed surface retains the surface grid boundary condition information.
• Added hot keys to pick a group (g) and composites (u) and to add entities to a group (Ctrl-g) and a composite (Ctrl-u).
• Added command line options -version and -build to SolidMesh and the grid tools.  These options provide version and build information about the executable and the supporting libraries used to link with the executable.

Bugs Fixed:

• Corrected problem with automatically removing duplicate trimming curves.  Previously removed too many curves and prevented some surfaces from trimming.
• Corrected problem with blended sweep using parametric curves.
• Corrected problem with periodic faces that share a common edge and have similar transformations.
• Corrected problems when copying curves and surfaces.  The original geometrical form definition was not retained when curves and surfaces were copied (i.e. translated, rotated, mirrored, or scaled).  This caused an incorrect evaluation of the copied curves and surfaces.
• Corrected problems when saving copied curves, edges and surfaces to a Save-State file.  The control point weights were not saved.
• Corrected bug to prevent the volume grid boundary conditions from being overwritten when reading in a grid using the GridViz panel (introduced in v5.61).
• Corrected bug with composite faces that was not correctly updating the composite surface grid.
• Corrected fatal error with composite faces when component surfaces have a degenerate edge. 
• Corrected memory leaks when
  • Generating an edge grid
  • Deleting a group that contains quadrilateral elements

Known Problems and Limitations:

• Trimming IGES-tagged periodic surfaces.
• Composite edges cannot currently be used with composite faces.  This is currently under development and will be available in the next release.