How to reproduce:

Right click on a file containing japanese (or multibyte?) tags.
Open the special infobox
Click the [...] in the bottom right to open the preferences
check the "override codepage"
mark one codepage, and scroll fast down, using arrowkeys

For me, this leads to foobar2000 crashing, without any errorlog

Sorry,can't reproduce here
What operating system are you using?
What version is your foo_infobox?

0.8.3 on Win2k sp4, foo_infobox v1.3.6a

I can send you a file it crashes on

After a long time dormancy,I finally wake up
Please download new v1.3.7 from here
Hope I have fixed this bug

Great news I`m in Japan at the moment, and wont be back until next July or so, but I`ll try it as soon as i get home

Edit: Got home now, almost 2 years later. Extended my stay a bit. Guess there is no point in testing anymore, seeing that .9 is out.