<s>
In	O
computing	O
,	O
XFixes	B-Device
is	O
an	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
extension	O
which	O
makes	O
useful	O
additions	O
to	O
the	O
X11	B-Operating_System
protocol	O
.	O
</s>
<s>
It	O
first	O
appeared	O
in	O
the	O
KDrive	B-Operating_System
X	B-Operating_System
server	O
and	O
later	O
in	O
X.Org	B-Operating_System
Server	I-Operating_System
version	O
6.8.0	O
.	O
</s>
<s>
The	O
theme	O
of	O
the	O
collection	O
is	O
small	O
additions	O
to	O
remove	O
important	O
defects	O
in	O
the	O
protocol	O
that	O
ca	O
n't	O
be	O
worked	O
around	O
using	O
the	O
pure	O
X11	B-Operating_System
protocol	O
.	O
</s>
<s>
The	O
point	O
of	O
implementing	O
these	O
additions	O
in	O
an	O
extension	O
is	O
to	O
leave	O
the	O
core	O
server	O
code	O
,	O
and	O
a	O
server	O
that	O
does	O
not	O
include	O
the	O
XFixes	B-Device
extension	O
,	O
implementing	O
the	O
original	O
pure	O
X11	B-Operating_System
protocol	O
.	O
</s>
<s>
Version	O
5	O
introduces	O
pointer	O
barriers	O
,	O
which	O
allows	O
using	O
easy-to-reach	O
locations	O
(	O
according	O
to	O
Fitts	B-General_Concept
's	I-General_Concept
Law	I-General_Concept
)	O
even	O
in	O
multi-monitor	B-General_Concept
configurations	O
.	O
</s>
<s>
XFixes	B-Device
was	O
a	O
source	O
of	O
controversy	O
when	O
Packard	O
committed	O
the	O
extension	O
to	O
the	O
XFree86	B-Device
project	O
hours	O
before	O
the	O
feature	O
freeze	O
window	O
for	O
XFree86	B-Device
4.3.0	O
began	O
in	O
December	O
2002	O
without	O
prior	O
approval	O
of	O
the	O
XFree86	B-Device
's	O
Core	O
Team	O
(	O
a	O
cathedral-style	O
group	O
that	O
were	O
allowed	O
to	O
commit	O
changes	O
to	O
the	O
project	O
,	O
of	O
which	O
Packard	O
was	O
a	O
member	O
)	O
.	O
</s>
