🚀 go-pugleaf

paul duggan asks what the differences are between amsfonts 2.0
and amsfonts 2.1.

attached is a portion of the READ.ME file that is included with
the distribution at e-math.ams.org in /ams/amsfonts/READ.ME .
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NOTE: MANY OF THE TFM FILES FOR AMSFONTS HAVE CHANGED FROM VERSION 2.0.
Line and page breaks may be affected by these changes. Therefore, we
suggest that you regenerate any DVI files which refer to these fonts,
after version 2.1 has been installed.

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WHAT CHANGES WERE MADE IN VERSION 2.1, AND WHY SHOULD EVERYONE UPGRADE?

The changes which you will most readily notice are:

1.   All of the Euler Bold are more bold and extended. In previous releases,
     eufb was difficult to distinguish from eufm. Now they are more
     distinguishable.

2.   The Euler fonts in sizes smaller than 10 point were beefed up a bit
     so that they stand out more when used in subscripts and superscripts
     with 10 point text.

3.   The Metafont code for Blackboard Bold was changed so that these characters
     are much improved at low resolutions. Blackboard Bold characters on your
     screen or dot-matrix printer will no longer be ugly and unrecognizable.

4.   There was a bug in the MSAM fonts which caused them to have different
     TFM files when generated by Metafont at different resolutions. This led
     to different TFMs for the same fonts in different locations. Now there is
     one TFM which will be consistent everywhere (everywhere that version 2.1
     has been installed, that is).

5.   A few other changes were made which are less noticeable. A change in
     the code for EUEX eliminated a Metafont error with the 240dpi mode.
     A Metafont error which sometimes appeared in the Counter-clockwise
     Arrow was eliminated. Slight changes to some parameters in CMEX9 made it
     compatible with a previously existing version.

The reason everyone should upgrade is simple: In order to solve the problems
which existed in version 2.0, the metrics of some of the fonts were changed.
This means that the TFM files are different, which means that TeX will produce
different line and page breaks. If everyone upgrades to the new version, then
the portability of TeX, one of its greatest assets, will remain intact. If
you continue to use an old version of these fonts, then your output files may
not be portable to other sites. So, PLEASE encourage all of your friends and
colleagues to upgrade to AMSFonts 2.1 to avoid confusion and errors.