Search restrictions when logged in?

[BeeCoin]

Hi folks

I wonder: when I'm logged in, there seems to be occasianally a search restriction that there have been (enough?) search requests in the last 360 (minutes/seconds?)?
So I was wondering: Is this due to my Internet provider re-using the same IP?

Would like to re-construct the error but - according to murphy's law - the same problem doesn't show up at the moment again...

Any ideas?
best regards
BeeCoin