I noticed a fall in visitor numbers today to my wordpress 2.5.1 blog http://tamarindtrees.net. Upon checking google webmaster tools, I found an unusual number of "not found" crawl errors and a very high number of "short meta description" errors.
The links referred to under "short meta descriptions" are not ones I installed on my site, they lead to what appears to be spam marketing for anti-virus software, and I'm more than a bit worried about them. An example of one follows:
The directory /upgrade/ is not one that I remember ever having used.
I'm concerned I've been hacked.
Can anyone recommend how I :-
1. Find out whether I have been hacked
2. What the damage is
3. Whether it's necessary to shut down the site while this is fixed
4. How I fix it.