Old question, but I had a related and similar problem with a solution that is relevant to this:
My (unrelated electronic design automation) triggered svn: Error resolving case of "<blah blah> errors, followed by what looked like my commit log message. In the end, I realized that some double quotes ( " ) that I used for log messages were interpreted as the completion of the message, then the rest of my babble was taken as an entrance to svn. My solution was just to use single quotes.
In your case, it sounds like your program (Aptana) might be scared, because when it sees spaces in the path name, it covers the path in quotation marks, maybe something will break (redundant quotes?). This will be allowed if you just work in the root directory of C:\ , because in the root path of the WC ...\My Documents\... there are no spaces.
Nick t
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