To get Rgrep to work under Windows I had to do two things. I needed to specify the Quote_Char in my vimrc file like this:
:let Grep_Shell_Quote_Char = "\""
And I edited the grep.vim plug afterline 534. I added these two lines:
let tmptxt = split(filepattern) let txt = join(tmtxt) . ' '
This was an easy way to remove a leading white space character that the windows
strpart(txt,0, stridx(txt, ' ')) could not seem to handle properly.
I looked for a solution to this problem for a while. Perhaps this isn't the best place for it, but at least someone else might find it when they are looking. --March 25, 2013