in javawebstart, and now the new plugin, version strings are parsed to determine if a build is GA or pre-GA, and only GA builds are considered when matching platform version specifications.
The old versioning spec says any full version string containing a hyphen character is pre-GA, like 1.6.0_10=ea or 1.7.0-rc.
However with the creation of J4B, post GA builds now have "-rev" in the full version string (like 1.6.0_12-rev02).
We should change the logic in javaws (and the new plugin) to consider GA any full version with "-rev" in the version string.