I entered a SQL query in the "SQL" tab as I've done thousands of times without issue and I got a blank page with these errors:
import.php: Missing parameter: import_type (FAQ 2.8)
import.php: Missing parameter: format (FAQ 2.8)
Also note that in the bug reporting page (it's just over here as I'm writing) there's a bogus link that pretends to give information about this:
"For the various "missing parameter" problems, see http://bugs.php.net/bug.php?id=31134
That points to an old PHP bug reported in 2004 flagged as "not a bug" and apparently unrelated. Even if it is related, that doesn't give much information about the phpmyadmin issue.