Hello,
Recently released a new service release of Mathcad 15 M030. List of bugs fixed in Mathcad 15 M030:
PDF file "Mathcad 15.0 M30 Read This First", which presented a list of bug fixes, can be found in attachment.
Note that the manual "Read this First" and "Installation Guide" can be found in "Help" menu with first run the installation package of Mathcad.