Gaps in some @Math symbols?

Greetings.

I've just recently built and installed Lout 3.37.  Many thanks to Dr.  
Kingston and everyone else who works on this fine product.  My  
platform is MacOS X 10.5.5, with Ghostscript 8.63.

Under the new v3.37, I'm seeing small gaps in some of the @Math  
symbols that are composed from simpler glyphs -- namely the 'sqrt'  
radical sign, and one pair of the matrix delimiters, 'blpar' and  
'brpar'.  I haven't noticed any other problem symbols yet.  I'm  
attaching a 'tgz' file which I hope demonstrates the gaps -- inside is  
a short Lout document, along with its PS and PDF output as generated  
on my system.  Please let me know if the attachment doesn't make it  
through email.

This is the first time I've tried the new @Math environment, as  
opposed to @Eq.  I haven't noticed gaps in any symbols before, but  
then I don't often use these particular ones.  I only noticed the gaps  
this time because I decided to print out the latest User's Guide to  
replace my much older copy.

I understand these sorts of bugs can be system-specific, so it might  
only be me seeing this.  If the gaps don't show up for anybody else  
though, that's useful information too.  For what it's worth, when I  
send the above PS file to a PostScript printer, the bug is visible  
there as well -- not just on the screen.

Thanks for listening, and for any guidance or information.

-- Colin K.