It was the Bitcointalk forum that inspired us to create Bitcointalksearch.org - Bitcointalk is an excellent site that should be the default page for anybody dealing in cryptocurrency,
since it is a virtual gold-mine of data. However, our experience and user feedback led us create our site;
Bitcointalk's search is slow, and difficult to get the results you need, because you need to log in first to find anything useful - furthermore, there are rate limiters for their search functionality.
The aim of our project is to create a faster website that yields more results and faster without having to create an account and eliminate the need to log in -
your personal data, therefore, will never be in jeopardy since we are not asking for any of your data and you don't need to provide them to use our site with all of its capabilities.
We created this website with the sole purpose of users being able to search quickly and efficiently in the field of cryptocurrency
so they will have access to the latest and most accurate information and thereby assisting the crypto-community at large.
I have a suspicion that it might be possible for Bitcoin's network connectivity to get into a bad state. When it was in this state, I think that it stopped accepting incoming connections. My active connections hovered under 15 connections and although my blocks did update, I was generating almost zero blocks whereas I had been generating a fair amount beforehand. Restarting Bitcoin seemed to fix the problem. Of course it might have been the fault of my operating system, my router, my ISP or my imagination. This problem, whether real or imagined, happens very infrequently as far as I can tell. Bitcoin chugs along very nicely most of the time.
On IRC, solar mentioned the possibility that Bitcoin might on occasion get into a state where each thread does many fewer calculations than usual.
It's all just speculation, but if you have the feeling that Bitcoin isn't working quite right, I suppose it can't hurt to restart your client. ;-)