It's important that files have the correct MIME type and EOL settings in Subversion. We have a checking script in SVN which makes sure they're set, since if they're not it can cause some problems later. In order to automatically configure these properties, use the 'auto-props' section of your Subversion configuration file (e.g. TortoiseSVN > Settings > Edit - or in ~./subversion/config on Unix/Mac). Here's some suggested settings:

[auto-props]
 ### The format of the entries is:
 ###   file-name-pattern = propname[=value][;propname[=value]...]
 ### The file-name-pattern can contain wildcards (such as '*' and
 ### '?').  All entries which match will be applied to the file.
 ### Note that auto-props functionality must be enabled, which
 ### is typically done by setting the 'enable-auto-props' option.
 *.c = svn:mime-type=text/plain;svn:eol-style=native
 *.cpp = svn:mime-type=text/plain;svn:eol-style=native
 *.h = svn:mime-type=text/plain;svn:eol-style=native
 *.dsp = svn:mime-type=text/plain;svn:eol-style=CRLF
 *.dsw = svn:mime-type=text/plain;svn:eol-style=CRLF
 *.sln = svn:mime-type=text/plain;svn:eol-style=CRLF
 *.vcproj = svn:mime-type=text/plain;svn:eol-style=CRLF
 *.sh = svn:mime-type=text/plain;svn:eol-style=native;svn:executable
 *.txt = svn:mime-type=text/plain;svn:eol-style=native
 *.gif = svn:mime-type=image/gif
 *.png = svn:mime-type=image/png
 *.jpg = svn:mime-type=image/jpeg
 *.dds = svn:mime-type=application/octet-stream
 *.bmp = svn:mime-type=image/bmp
 *.in = svn:mime-type=text/plain;svn:eol-style=native
 *.bat = svn:mime-type=text/plain;svn:eol-style=native
 *.html = svn:mime-type=text/html;svn:eol-style=native
 *.xml = svn:mime-type=application/xml;svn:eol-style=native
 Makefile = svn:mime-type=text/plain;svn:eol-style=native
 *.cg = svn:mime-type=text/plain;svn:eol-style=native
 *.material = svn:mime-type=text/plain;svn:eol-style=native
 *.program = svn:mime-type=text/plain;svn:eol-style=native
 *.hlsl = svn:mime-type=text/plain;svn:eol-style=native
 *.glsl = svn:mime-type=text/plain;svn:eol-style=native
 *.fontdef = svn:mime-type=text/plain;svn:eol-style=native
 *.particle = svn:mime-type=text/plain;svn:eol-style=native
 *.script = svn:mime-type=text/plain;svn:eol-style=native
 *.overlay = svn:mime-type=text/plain;svn:eol-style=native
 *.texi = svn:mime-type=text/plain;svn:eol-style=native
 *.inc = svn:mime-type=text/plain;svn:eol-style=native
 *.am = svn:mime-type=text/plain;svn:eol-style=native