Tab hit markets at 37k. Current prices are 30k. Already 20% depreciation in 4months..!!!
Wait for couple of months more, you will have atleast another 10choices to select from, else you would surely see the Tab at 22-24k. :-)
This is due to a problem resolving the address. Yes, it looks like a bug specific to 50.0 and also 51.0. Ver 51.2.007 is out, why dont you try upgrading? Temporary workarounds include refreshing the cache, and removing the default http:\\www entry.