XCode SVN not comparing some file types on commit

Hello,

I'm new to XCode development. I've been looking around for SVN clients and there are a few options, but I know that XCode has a SVN client so I wanted to give it a try.

The thing is that, when commiting, the file diff embedded on the SVN client does not compares certain file types on the Version Editor pane, just shows the file icon on left-right compare panes, instead of the actual text comparisson.

I tried using the FileMerge XCode tool to compare two files with the same extension and it works, it shows me the left-right files on each pane. But when I use the SVN client... they are not shown, only the icon.

Any guess?