Nothingness: the quality of random numbers here has been discussed before, and there may be issues with them, or not.

However, rolling 7 doubles in a row has a chance of about 1:280000, meaning it is completely normal (and to be expected) that it happens once per 280000 tries.
If you consider that a Backgammon game has about 30 moves per side, and assume about 5000 games are played per year on Brainking, it should happen every other year.
So as annoying as it might be to lose that way, it is not necessarily a sign for something off - it should happen every other year.
Let's hope it doesn't hit you (or me) this year.