I am using Suse 11.0 with KDE 4.0 on a Dell Latitude D800 with a Broadcom BCM 4306. I am using the same driver (bcmwl5) that I used previously with this machine with 10.2 in which I did not have these problems.
linux-jf1w:~ # ndiswrapper -l
bcmwl5 : driver installed
device (14E4:4320) present (alternate driver: ssb)
linux-jf1w:~ # ifconfig
eth0 Link encap:Ethernet HWaddr 00:0D:56:36:8F:51
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Interrupt:11
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:272 errors:0 dropped:0 overruns:0 frame:0
TX packets:272 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:22096 (21.5 Kb) TX bytes:22096 (21.5 Kb)
wlan0 Link encap:Ethernet HWaddr 00:10:C6:CA:2A:A7
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Interrupt:5 Memory:fafec000-fafee000
linux-jf1w:/home/weblarry # iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
wlan0 IEEE 802.11g ESSID
ff/any
Mode:Managed Frequency:2.462 GHz Access Point: Not-Associated
Bit Rate:54 Mb/s Tx-Power:32 dBm
RTS thr:2347 B Fragment thr:2346 B
Encryption key
ff
Power Management
ff
Link Quality:0 Signal level:0 Noise level:0
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
If I remember correct the ndiswrapper on 10.2 did not list the (alternate driver ssb).