Why does it appear "Frame load interrupted by policy change" when I try to enter to my profile?

[Annitt]

It is my first time entering SL and I don't know what to do.

[Rolig Loon]

Frankly, I do not know either.  If you go to Apple's developer's library, you find a short description on that WebKit error which says "Indicates that a frame load was interrupted by a policy change.  Available in Mac OS X v 10.2 and later."  Really helpful. 

The last time someone posted a question about this error was several months ago.  As far as I can see, it was triggered by a temporary glitch in LL's servers.  It hasn't occurred since, which may mean that it's just another temporary gitch that will go away if you are patient.