I've got wrt1900 to replace our wrt54 working in bridge mode past 5 years.
I've connected wrt1900 in wireleass repeater mode to Apple Airport: amazing speed bump (wrt54 gave me 5-10mbit, wrt1900 is 20-50Mbit)!!
...but....
After 20-30 minutes of work, Internet connection disappears completely and only rebooting helps. I can see router, but no internet. I think the bridged connection dies. Tried everything: resetting, changing channel to fixed, different modes - no luck.
Using the latest firmware...