IDN Forums - Internationalized Domain Names - yahoo.co.jp: What's this Mean?

When searching for a keyword I get a message:

Quote:

ただいまキーワード検索には多大な要求が寄せられ、結果を表示できない場合があります。ご迷惑をおかけしますがご了承ください。

Seems to say that you can get a more refined search by adding more terms, then there are four options for different searches below. All four of those searches return the same text with no other options.

I've never seen this before and my site has been bouncing up and down the first page for this for the last four weeks or so. Any ideas?

TIA

EDIT: not there anymore. The search returns results as expected. Strange thing, though.