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    <font size="+1"><font face="Source Sans Pro">So, took my '<font
          size="+1">test machine' (Windows 7, MikteX 2.9),  </font>and
        tried out the latest Lua* updates (lots of updates - libs,
        binaries, many things...). And, said 'updates' completely breaks
        functioning system -- files not only don't compile, they y<font
          size="+1">ield nasty errors with words like 'fatal' in them.
          ;-)<br>
          <br>
          <font size="+1">Consider following simpl<font size="+1">e <font
                size="+1">MWE:<br>
                <br>
                <font size="+1">\documentclass[11pt,letterpaper]{article}<br>
                  <br>
                  \usepackage{unicode-math}<br>
                    \setmathfont{Asana Math}<br>
                  <br>
                  \begin{document}<br>
                  <br>
                  Lorem ipsum dolor sit amet, consectetur adipiscing
                  elit. Praesent in tincidunt nulla. Donec quis laoreet
                  est. Aenean vitae est felis, a venenatis magna. Mauris
                  semper bibendum vulputate. Etiam bibendum quam ut erat
                  rutrum consequat.<br>
                  <br>
                  \begin{equation}<br>
                  \frac{dN}{dt}=rN\left(1-\frac{N}{K}\right)<br>
                  \end{equation}<br>
                  <br>
                  Lorem ipsum dolor sit amet, consectetur adipiscing
                  elit. Morbi eget dolor ac diam interdum volutpat. Cras
                  luctus congue nibh, at dictum nulla iaculis quis.<br>
                  <br>
                  \end{document} <br>
                  <br>
                   When I try to compile the file (from command line, or
                  otherwise), I get<br>
                  <br>
                  <font size="+1">Command Line:   lualatex.exe
                    --shell-escape "lua-mwe.tex"<br>
                    Startup Folder: C:\Users\egc\Desktop\downloads\mwe
                    files<br>
                    <br>
                    This is LuaTeX, Version beta-0.76.0-2013062419 (rev
                    4627) <br>
                     \write18 enabled.<br>
                    <br>
                    (Fatal format file error; I'm stymied)<br>
                    LuaLaTeX failed to create a pdf file.<br>
                    For possible explanations start the command from the
                    Command Prompt...<br>
                    <br>
                    <br>
                    <font size="+1"><fyi: trying from the command
                      prompt yields the same message<font size="+1">></font>.
                      <br>
                      <br>
                      <font size="+1">So, now we'e back to figuring out
                        which of the 6-8 <font size="+1">'updates'
                          (along, <font size="+1">or together) is not
                            playing nice....<br>
                            <br>
                            <br>
                          </font></font></font></font></font></font></font></font></font></font></font></font>
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