Maybe it was hacker`s attack?
 

Till today script worked just fine, but today I have noticed that list.php doesn`t work, I get a blank page with error

Got error 28 from table handler

How should I fix it?

I have noticed too that statistics.php?type=mostterms and statistics.php?type=largestresults and statistics.php?type=mostempty and statistics.php?type=responsebyhour returns blank pages too.

In the statistics.php?type=lastqueries I have noticed 2 stranges queries

fat content-type text/plain charset us-ascii mime-version 1.0 content-transfer-encoding 7bit subject uly days arisians deposed harles former bcc clegbe@aol.com fe73f4417011038802852985c78770d7

and

heath content-type text/plain charset us-ascii mime-version 1.0 content-transfer-encoding 7bit subject bring home with thim bcc charleslegbe@aol.com b9d0e1344cc5a85664071ddcfb53db09

It`s a hacker`s attack?

How should I fix all these pages?