error in 'sed' during thunderbird 3.0.6 build

[Yuri]

Hi,

I got this minor looking error, but I decided to report it anyway:

gmake[4]: Leaving directory 
`/usr/ports/mail/thunderbird3/work/comm-1.9.1/mail/app'
gmake[3]: Leaving directory 
`/usr/ports/mail/thunderbird3/work/comm-1.9.1/mail'
gmake[2]: Leaving directory `/usr/ports/mail/thunderbird3/work/comm-1.9.1'
gmake[1]: Leaving directory `/usr/ports/mail/thunderbird3/work/comm-1.9.1'
sed: 
/usr/ports/mail/thunderbird3/work/comm-1.9.1/mozilla/build/unix/*.pc: No 
such file or directory
...

Install finished successfully.

Thanks,
Yuri