From the release notes:
Mathcad 14 M030 fixes and improves existing functionality and includes the following new features:
Windchill 9.1 M010 Workgroup Manager (WGM) support
New installer�You can now customize your Mathcad installation by selecting the language, components, and directories.
User interface translation into Russian
Bug fixes:
1436139 Addresses specific problems involving rapid consumption of memory upon repeated recalculation of a worksheet.
1502717 Fixes improper result returned when evaluating 2^31.
1507803 Addresses a specific memory leak issue relating to an uninitialized handle.
1507032 Addresses a compatibility problem resulting from an improvement in how numeric tolerance in integrals was inferred.
1547641 Fixes PDF file generation problem on Window XP x64 machines.
1437427 Fixes in-line evaluation to update display to match available value.
1587915 Addresses a WRITEPRN restriction by increasing the maximum allowable string length from 128 to 1024.
1403321 Addresses specific memory release issue involving large worksheet computations.
That's all.
Richard