You don't mention much details about your installation, version of mojoportal, Medium Trust? folder or host based sites? related sites mode?

The only situation where I can envision this happenng is in medium trust because you have to specify the index folder in Web.config or user.config like this format:

<add key="Lucene.Net.lockdir" value="D:\__projects\mojoportal\joe\Web\Data\Sites\1\index" />

so in medium trust it may not work correctly as it may use the same index files for all sites. In this case there is nothing I can think of to solve it other than to disable search and remove the search link from the skin. This is only a theory based on your statments.

In full trust I cannot produce this problem on my machine, I have not tried to produce it in medium trust.

In general this should not happen because each site has a separate seach index under /Data/Sites/[SiteID]/index, so I would look into whether files are being written there for all your sites or not.

Hope it helps,

Joe

I would try rebuilding the search index in site 10 by deleting the index files and doing a search then wait 5 minutes or so for it to build the index. Then try searching for moore and see if it still gets results from site 1.

See if the problem persists after that.

Hope it helps,

Joe

So the problem seems to be that site 10 is using the index from /Sites/1/index.

Are you sure you don't have something like this in Web.config or user.config

<add key="Lucene.Net.lockdir" value="C:\__dev\mojoportal\joe\Web\Data\Sites\1\index" />

obviously I don't mean the same path, but if you have this setting it may force all sites to use the /Sites/1/index

This setting is typically needed for medium trust but is not needed for full trust.

Hope it helps,

Joe