With the new iPhone 2x files i've stumbled uppon this problem...
You need to add a "@" sign in the end to get SVN to process the file.
For example, if you had a file called [email protected] which you want to add to SVN, you would type:
svn add [email protected]@
If you have lots of files with the "@" symbol in their name that you want to process in a batch (i.e. use * wildcard), you can do something like this in OS X Terminal:
find . -name "*@*" | xargs -I % svn add %@
The above command will use the find utility to list out each file with @ in its filename and then pipe the path to the file to SVN using XARGS. XARGS will replace each occurrence of % with the path and append the special "@" at the end of the filename so that SVN will accept it.
Hope this helps - I had to whack my head for a bit to add the gazzilion @2x.png files that were needed for my app to be upgraded for iOS4.0