Seeing recursion in modprobe...

I've got the following segment of /etc/modprobe.conf:

options bt878 debug=5
options bttv card=113 i2c_hw=1 bttv_debug=1
options dst verbose=5 dst_addons=0
options dvb_core dvb_shutdown_timeout=0

install bttv /sbin/modprobe --ignore-install bttv
remove bttv { /sbin/modprobe -r --ignore-remove bttv; }

...

But when I run it, I see:

[root@pvr bt8xx]# modprobe -v -r bt878

^C
remove { /sbin/modprobe -r --ignore-remove bttv; }
FATAL: Module bttv is in use.
WARNING: Error running remove command for bttv

[1]+  Stopped                 modprobe -v -r bt878
[root@pvr bt8xx]# kill %1
[root@pvr bt8xx]# rmmod bt878
[1]+  Terminated              modprobe -v -r bt878
[root@pvr bt8xx]#
[root@pvr bt8xx]# modprobe -v -r bttv
remove { /sbin/modprobe -r --ignore-remove bttv; }
rmmod /lib/modules/2.6.12-1.1381_FC3/kernel/drivers/media/video/bttv.ko
rmmod /lib/modules/2.6.12-1.1381_FC3/kernel/drivers/media/video/video-buf.ko

rmmod /lib/modules/2.6.12-1.1381_FC3/kernel/drivers/media/video/btcx-risc.ko
rmmod /lib/modules/2.6.12-1.1381_FC3/kernel/drivers/media/video/tveeprom.ko
rmmod /lib/modules/2.6.12-1.1381_FC3/kernel/drivers/media/video/videodev.ko
[root@pvr bt8xx]#

And what's the work-around?

Thanks,

-Philip