Hi Evan,
Change: 

while( defined ( my @row = $sth->fetchrow_array ) ) {

[download]
to: 
while( my @row = $sth->fetchrow_array ) {

[download]
and an endless loop problem is fixed.
I think the other problem is your peculiar choice of quote_char.
I found that specifying the general quote char on DBI connection options makes the error go away. As you probably know, this is a general setting, not per table/csv handle. 
my $dbh = DBI->connect('DBI:CSV:f_dir=.;csv_quote_char=~;')  or die ..
+.

[download]
I didn't have time to investigate on this one, though it would be interesting to do.

In reply to Re: A bug in DBD::CSV? by cosimo
in thread A bug in DBD::CSV? by EvanCarroll

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