Version:            (using KDE KDE 3.3.0)
Installed from:    Debian testing/unstable Packages
OS:                Linux

kmail in kde 3.3 doesn't allow drag'n'drop of emails. After dropping an email to the desktop or konqueror (and asking for a name of the file) only a small file (around 160bytes) is created. this file contains parts of the sender, subject, recipient and is not ascii-encoded (every second byte is 0x00):

0000:0000 00 00 00 92 00 00 00 2c 00 75 00 35 00 79 00 54 .......,.u.5.y.T
0000:0010 00 56 00 6c 00 54 00 45 00 4d 00 74 00 30 00 67 .V.l.T.E.M.t.0.g
0000:0020 00 46 00 4d 00 4b 00 35 00 56 00 79 00 66 00 7a .F.M.K.5.V.y.f.z
0000:0030 00 75 00 77 00 00 00 18 00 41 00 6e 00 74 00 77 .u.w.....A.n.t.w
0000:0040 00 6f 00 72 00 74 00 3a 00 20 00 2e 00 2e 00 2e .o.r.t.:. ......
0000:0050 00 00 00 36 00 63 00 68 00 72 00 69 00 73 00 74 ...6.c.h.r.i.s.t
0000:0060 00 69 00 6e 00 61 00 2e 00 65 00 72 00 62 00 40 .i.n.a...e.r.b.@
0000:0070 00 76 00 64 00 6e 00 2d 00 62 00 65 00 72 00 6c .v.d.n.-.b.e.r.l
0000:0080 00 69 00 6e 00 2e 00 64 00 65 00 00 00 18 00 44 .i.n...d.e.....D
0000:0090 00 61 00 6e 00 69 00 65 00 6c 00 20 00 46 00 72 .a.n.i.e.l. .F.r
0000:00a0 00 65 00 69 00 6e 41 3e b5 85                   .e.i.nA>µ.      

I don't know if this is related but during testing d'n'd of emails to konqueror konqueror somtimes crashed (before releasing the mouse button), and sometimes also kmail.

Daniel Frein