what was googlebot searching for?

never seen this before in my logs

[yaelede]

I have found these two lines in my logs:

GET /robots.txt - 200 0 399 204 61 HTTP/1.0 Googlebot/2.1+(+http://www.googlebot.com/bot.html)

GET /+ - 404 2 4184 197 0 HTTP/1.0 Googlebot/2.1+(+http://www.googlebot.com/bot.html

The first one is OK of course, but what does the second line mean?

[uncle_bob]

A + is the url encoding for a space, so possibly you have a link on the website to "www.yoursite.com/ " - note the extra space after the / and google is translating that to "www.yoursite.com/+" hence the /+ request in the logs.

[bakedjake]

A + is the url encoding for a space

Wrong. %20 is the hex encoding for a space.

Most likely, you have a link pointing to /+ on your site somewhere. Check that.

Note: Some sites do use + as a substitution for a space, but that doesn't mean they are the same thing.

[yaelede]

thank you bakedjake.
i checked my site, there is no "/+" in any of my pages at all, so this must be a wrong link from another site..(?)

[g1smd]

Try a search for @domain.com/+ and see what you get.

the @ symbol is a trick that is needed to make Google do the search that you want.