New Build Number: 20070810_1700
This is the text from a pdf posted at Autodesk's download page for Revit Structure, download it from THIS LINK.
Improvements made in the current Web Update SP2 build (20070810_1700):
Straight beam joins and cuts back properly when supported by vertical curved beams.
Improves stability after receiving a corrupt element warning when opening a project.
Improves stability when saving a Project with a linked DWG™ file that contains an image.
Improves stability when applying a view template to a sheet view.
In Windows Vista™ operating system, allows the ability to write to revit.ini, licpath.lic, KeyboardShortcuts.txt, and the Journals folder.
Line based families contained in a group are no longer flipped when the group is mirrored.
Improves stability when importing group into Titleblock family.
Allows the ability to export renderings to TIFF format.
When temporary dimension text too small to read, user can adjust the size of the font through Revit.ini.
Linked DWG added by another user will now show up in Manage Links after reload latest.
“Relative” spot elevation updates automatically with the change in Level elevation.
When exporting to DWG file, overlapping lines that share a point are no longer missing in the resulting DWG.
There is also some new content available via THIS LINK.
Improvements made in the previous Web Update SP1 build (20070607_1700):
Track Changes toolbar works properly with third-party application.
Fixes very small dimension rounding error inaccuracy for the levels in the default structural project
Duplication of structural steel framing and column .rfa content in UK Library no longer occurs.
Enhances the ability to open .rvt file containing imported/linked .dwg with incorrect boundary hatch.
Estimated Reinforcement Volume of rebar is calculated correctly.
Beam’s analytical model auto-adjusted to slab updates automatically when slab is deleted.
Column’s analytical model auto-adjusted to slab updates automatically when moved out of tolerance.
Manual analytical adjustment of a beam to the end of a wall functions properly.
Beam whose vertical z-Direction Justification was set to "Other" makes the analytical model in the correct position.
Improves stability when importing .dwg or .dxf with the presence of an older version of DWG TrueView™
installed on the computer.
For a selected Line, Hide Category in View no longer affects all Categories of Lines.
Some Detail, Plan, or Section Callouts are no longer erroneously hidden in cropped views.
Masking Regions in Tag Families will now obscure elements in project and in exports.
Filled Regions containing Solid Fills, which are overridden to be Transparent, now print consistently between Vector and Raster modes.
Improves stability with Overlay Planes turned off in Graphics Settings.
Crop Regions which were previously missing are now visible in Views in upgraded files and templates.
Display problems in a view no longer occur when zooming with OpenGL® hardware acceleration turned on.
Copying nested links from the Project Browser places the Link and its nested components.
Last, be sure to visit the BIM & BEAM Blog