Hello,
please consider the following example:
<example file="ex8.tex">
\starttext

\font\test=txr \test abs

\stoptext
</example>

I process this document with context (context --version -> 2012.01.25)
nothing suspecious in terminal output but in log file I see "checksum mismatch",
<terminal>
$ grep 'checksum' ex8.log
checksum mismatch in font txr.vf ignored
</terminal>

Simple plain tex file
<example file="ex9.tex">
\font\test=txr \test abs
\bye
</example>

processed by luatex and pdftex engines (both from TeX Live 2011, I don't know
how to generate formats for them in context suite) doesn't give same message.

Is it a "bug" in font system of context?