Version:            (using KDE KDE 3.4.0)
Installed from:    Gentoo Packages
Compiler:          gcc (GCC) 3.3.5  (Gentoo Linux 3.3.5-r1, ssp-3.3.2-3, pie-8.7.7.1)
 
OS:                Linux

OK, when you enter https page, the address bar goes yellow, that's a nice thing :) if you then enter some file:// location into that address bar, it'll go white again, but... if you press back button (so go back to https page), address bar goes yellow again, but if you then press forward button (to go to the file:// location) the address bar stays yellow :)

Steps to reproduce:
1. go to some https page, so the address bar goes yellow
2. enter some file:// location into the address bar, address bar should be white now
3. press back button - you should be back on the https page, and address bar should be yellow
4. press forward button, you're on file:// location, address bar is still yellow.

I don't think it can be dangerous in any way nor it is annoying, but i don't think it's a planned feature :)

Greets
Qrto