What does that mean? I'm using AuditMyPC.com's sitemap generator and when I click on the errors tab I see that error for ever single one of my pictures. What's going on?
No I haven't tried it with another. But I checked it on FPS Gaming and Halo 2 Glitches and the result was the same for both.
Invalid response code: -1 looks tool-specific because I've never seen it coming from Google. The question is... is it the coding on your site, the settings used on the tool, security software on your site confusing it for an attack of some sort. Most tools out there won't give you very useful feedback if there is an issue. I personally review each website coming through AutoMapIt.com and may be able to tell you exactly what is going wrong and often times, how to fix it so that your website is nice and spider-friendly. If you have problems with other tools, stop by and sign up at my site. There may be issues that the spider is specifically setup to find, even though GSite is a good one. I used to use it myself.