Upgraded to v7.11.1 with the same symptoms.

Here's an example line (paraphrased of course):
$ curl -F
"f1=MHIGCSsGAQQBgjdYA6BlMGMGCisGAQQBgjdYAwGgVTBTAgMCAAACAmYDAgIAwAQI
hYBPinzaqcQEEP37GybFXZnCXPRvrFEeLBgEKNx6zGTVv4YPpX8698MYKkKiJ461
9CUepuqUSdw7zJWUyBW31Khk5b8=
MFoGCSsGAQQBgjdYA6BNMEsGCisGAQQBgjdYAwGgPTA7AgMCAAACAmYDAgIAwAQI
L9bqrmEHNRkEEFOmOVCDS+a/qtv/sx6BKzoEEBQoXYjoce0h8UKApU9TFQU=" $URL

In the above example, all that is sent is (some headers removed for
brevity):

Content-Type: multipart/form-data;
boundary=----------------------------5df73f6a4184

------------------------------5df73f6a4184
Content-Disposition: form-data; name="f1"

MHIGCSsGAQQBgjdYA6BlMGMGCisGAQQBgjdYAwGgVTBTAgMCAAACAmYDAgIAwAQI
------------------------------5df73f6a4184--

ie only the first line is given in the form data.

On Thu, 2004-04-22 at 14:18, Daniel Stenberg wrote:
> On Thu, 22 Apr 2004, Robert Marlow wrote:
>
> > I'm writing a script using curl (the executable). The script uses a
> > multipart/form-data post and has several fields it needs to submit. A few of
> > the fields have values which take up several lines. I've noticed only the
> > first lines of these multi-line values are getting submitted.
>
> Can you show us the exact command line and some test files that make this
> happen for you? The formpost code in curl doesn't care about newlines, it adds
> whatever you tell it to.
>
> > Is there any way I can avoid this happening and get all lines submitting
> > with newlines included? I'm using curl 7.9.5.
>
> That curl version is more than two years old. We've fixed hundreds of bugs,
> added thousands of lines source code and added dozens of features since that
> was released.
>
> Please upgrade and check if a recent release doesn't fix your problems.
>
> --
> Daniel Stenberg -- http://curl.haxx.se -- http://daniel.haxx.se
> Dedicated custom curl help for hire: http://haxx.se/curl.html
>

-- 
Regards,
Robert Marlow