Description:
------------
The problem is whet I try to fetch message with following structure:

MIME-Version: 1.0
Content-Type: multipart/mixed;
	boundary="----------636F494B2165"

------------636F494B2165
Content-Type: text/plain; charset=windows-1251
Content-Transfer-Encoding: 8bit

Here comes plain text with cyrillic characters. 


sd
fsd
f
sdf
s
df
sdf
sf
s
ылвоарлорпл

------------636F494B2165
Content-Type: application/octet-stream;
 name="vssver.scc"
Content-transfer-encoding: base64
Content-Disposition: attachment;
 filename="vssver.scc"

NBIBADCSAGDjY9URiUMAkCdir0j+oz57LigBAAAAAACQ0QEAUdL+w7xrBRUCAAAA

------------636F494B2165--

So when I try to call imap_fetchbody() with partid = 1 (where plain text is) I returns an empty string some times.
I have tested this operation on messages, that differs only by length of TEXT/PLAIN part and presence of cyrrilic characters.
So when length is more then 50-100 bytes and we have cyrillic characters in the end of this part the imap_fetchbody() returns en empty string.

Reproduce code:
---------------
imap_fetchbody( $mbox, ($HTTP_GET_VARS['msgid']+0), ($HTTP_GET_VARS['partid']), FT_PEEK || FT_UID )

Expected result:
----------------
Here comes plain text with cyrillic characters. 


sd
fsd
f
sdf
s
df
sdf
sf
s
ылвоарлорпл


Actual result:
--------------
<an empty string>