Dear Friends, I have 2 questions please:

1-Some sites are linking to my pages like this example:
http://www.totaltutorial.com/show-tu...-the-solution/
For linking to my actual web page:
http://www.tutorialsroom.com/tutoria...s_non_www.html
When I checked the server response for the first link, it shows "302 Found" , so my question is: Could this type of linking affect my ranking? and if this was true, wouldn't it be easy for competitors to use this type of linking to harm you?

2-If you click on the first link, you'll see that my site is displayed in a frame within the other site, is there any way through .htaccess or php to prevent this?

When I checked the server response for the first link, it shows "302 Found" , so my question is: Could this type of linking affect my ranking? and if this was true, wouldn't it be easy for competitors to use this type of linking to harm you

Not any more, but it won't have any positive SE effect either.

2 - No, but there are plenty of "frame busting" javascript solutions about.

302 is the error code for "Moved Temporarily", not found. Why they're using it, I don't know.

As far as the first link goes, I don't think you'd want to bust out of the frame in this case. A site like tutorialsroom can send quite a bit of traffic, but if you bust out of their frame you may lose them as a traffic source.

Just something to think about.

302 is the error code for "Moved Temporarily", not found.

302 is the HTTP/1.0 Status Code for "Moved Temporarily"

for HTTP/1.1
302 is now "Found"
&
307 is "Temporary Redirect"

[offtopic]Next bit not for Adam 'cos he knows this [/offtopic]

Why they use a redirect is to be able to track clicks on the links. And it's a 302 rather than 301 because they don't know any better.

What happens is the page is using PHP's header("new_url") or ASP's response.redirect("new_url") to redirect from a "jump" link, and that will send a 302 response to the useragent.
Coding a 301 as the redirect will take 3 lines of code instead of one.