Known nath bugs?

[SebastianSturm@t-online.de (Sebastian Sturm)]

Hello all,

is there a list of know nath bugs somewhere on the web? I tried to find 
one using Google, but unfortunately without success.

The reason I'm asking this is that I'm encountering some problems with 
the module and would like to know if they are common or if it's related 
to my configuration. First of all, using the units module together with 
nath doesn't seem to work - for instance, $1\Micro\Coulomb$ works as 
expected without nath, but produces the error message "Please don't say 
\def cs{...}, say \def\cs{...}" when used together with nath. I also 
thought that delimiters like ( or [ should automatically adjust to the 
formula they contain, but (\sum_{something} 
\frac{something}{something}) only produces standard parentheses. 
Commands like \lbrace or \lbrack work as expected, though.

If these problems are unknown, I can post a small example file and my 
logfile.

Best regards,

Sebastian