$mp3->update_tags( $mp3_tags ); # write tags to tmp.mp3
.
.
copy( 'tmp.mp3', $target);

##</code><code>##


root@trekulbollox:~/convert_wma# ls -l
total 57864
-rwxr-x--- 1 root root     2595 2011-10-31 03:37 convert_wma.pl
-rw-r--r-- 1 root root        0 2011-10-31 03:37 errors
-rwxr-xr-x 1 root root  9913921 2011-10-31 03:01 original.wma
-rw-r--r-- 1 root root 24627199 2011-10-31 03:38 test.mp3
-rw-r--r-- 1 root root 24627327 2011-10-31 03:38 tmp.mp3
root@trekulbollox:~/convert_wma# id3v2 -l tmp.mp3
id3v1 tag info for tmp.mp3:
Title  : Big Foot                        Artist: Stephen Riley
Album  : Easy to Remember                Year: 2007, Genre: Jazz (8)
Comment:                                 Track: 2
tmp.mp3: No ID3v2 tag
root@trekulbollox:~/convert_wma# id3v2 -l test.mp3
test.mp3: No ID3 tag