<s>
This	O
is	O
a	O
list	O
of	O
all	O
versions	O
of	O
the	O
Zune	B-Protocol
software	I-Protocol
that	O
were	O
released	O
.	O
</s>
<s>
The	O
1.0	O
versions	O
of	O
the	O
Zune	B-Protocol
software	I-Protocol
were	O
a	O
modified	O
version	O
of	O
Windows	B-Device
Media	I-Device
Player	I-Device
11	I-Device
while	O
versions	O
since	O
2.0	O
are	O
built	O
independently	O
with	O
additional	O
DirectShow	B-Library
decoders	O
for	O
AAC	B-Application
,	O
MPEG-4	B-Algorithm
,	O
and	O
H.264	B-Application
.	O
</s>
<s>
1.2	O
1.2.5511.0	O
2006-12-19	O
Fixed	O
compatibility	O
with	O
Windows	B-Application
Vista	I-Application
and	O
improved	O
browsing	O
performance	O
.	O
</s>
<s>
New	O
user	O
interface	O
on	O
both	O
the	O
Zune	O
device	O
and	O
the	O
Zune	B-Protocol
software	I-Protocol
.	O
</s>
<s>
2.4	O
2.3.1338.0	O
2008-01-22	O
Resolves	O
a	O
number	O
of	O
issues	O
including	O
problems	O
with	O
marketplace	O
,	O
podcasts	O
,	O
sync	O
,	O
Xbox	B-Application
streaming	O
,	O
and	O
library	O
problems	O
.	O
</s>
<s>
Also	O
adds	O
new	O
features	O
such	O
as	O
gapless	O
playback	O
,	O
smart	O
playlists	O
,	O
new	O
sorting	O
options	O
,	O
multiple	O
device	O
syncing	O
,	O
and	O
support	O
for	O
XNA	B-Device
(	O
Xbox	B-Application
game	O
developers	O
will	O
be	O
able	O
to	O
load	O
custom	O
code	O
using	O
the	O
XNA	B-Device
platform	O
)	O
.	O
</s>
<s>
Zune	O
Social	O
is	O
better	O
integrated	O
,	O
and	O
users	O
with	O
Windows	B-Protocol
Live	I-Protocol
Messenger	I-Protocol
can	O
display	O
which	O
song	O
is	O
being	O
played	O
to	O
people	O
in	O
their	O
buddy	O
list	O
.	O
</s>
<s>
A	O
clock	O
,	O
screen	O
lock	O
feature	O
,	O
and	O
free	O
games	O
(	O
Texas	B-Device
Hold'em	I-Device
and	O
Hexic	B-Application
)	O
are	O
added	O
.	O
</s>
<s>
A	O
new	O
multiplayer	O
mode	O
and	O
single-player	O
difficulty	O
levels	O
are	O
added	O
to	O
Texas	B-Device
Hold'em	I-Device
.	O
</s>
