Bug causes gnuplot to put only half of the xtics

[Gerald C. <je...@av...>]

My computer:
Redhat 9
2.4.34 kernel
Haven't updated any libraries, so the libraries are whatever version 
came with RedHat 9
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Tiny example of data used:
20070712000004 2007-Jul-12 00:00:04 74.3 69.6 60.9 60 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy
20070712000008 2007-Jul-12 00:00:08 74.3 69.6 60.9 60 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy
20070712000011 2007-Jul-12 00:00:11 74.3 69.6 60.9 60 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy
20070712000014 2007-Jul-12 00:00:14 74.3 69.6 60.9 60 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy
20070712000017 2007-Jul-12 00:00:17 74.3 69.6 60.9 60 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy
20070712000022 2007-Jul-12 00:00:22 74.3 69.6 60.9 60 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy
20070712000028 2007-Jul-12 00:00:28 74.3 69.6 60.9 60 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy
20070712000032 2007-Jul-12 00:00:32 74.3 69.6 60.9 60 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy
20070712000035 2007-Jul-12 00:00:35 74.3 69.6 60.9 60 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy
20070712000039 2007-Jul-12 00:00:39 74.3 69.6 60.9 60 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy
20070712000042 2007-Jul-12 00:00:42 74.3 69.6 60.9 60 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy
20070712000047 2007-Jul-12 00:00:47 74.3 69.6 60.9 60 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy
20070712000053 2007-Jul-12 00:00:53 74.3 69.6 60.9 60 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy
20070712000056 2007-Jul-12 00:00:56 74.3 69.6 60.9 60 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy
20070712000103 2007-Jul-12 00:01:03 74.3 69.6 60.9 60 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy
20070712000108 2007-Jul-12 00:01:08 74.3 69.6 60.9 61 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy
20070712000112 2007-Jul-12 00:01:12 74.3 69.6 60.9 61 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy
20070712000115 2007-Jul-12 00:01:15 74.3 69.6 60.9 61 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy
20070712000125 2007-Jul-12 00:01:25 74.3 69.6 60.9 61 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy
20070712000128 2007-Jul-12 00:01:28 74.3 69.6 60.9 61 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy
20070712000133 2007-Jul-12 00:01:33 74.3 69.6 60.9 61 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy
20070712000135 2007-Jul-12 00:01:35 74.3 69.6 60.9 61 74 0.0 315.0 NW 
69.6 0.05 0.05 0.72 Falling Cloudy

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gnuplot.dem file:
set key outside horizontal left;
set xdata time;
set x2data time
set timefmt "%Y%m%d%H%M%S";
set terminal png  transparent xffffff x000000 x404040 x0000ff xa52a2a 
x00ffff x006400 x9400d3 xcd5d5c
set size 1.5, 0.75
set output "temperature.png"
set xlabel "Time"
set ylabel "Degrees F & %RH"
set xtics rotate
set mxtics 5
plot "weather.TEMP" using 1:4 title "Inside Temp" with lines 
,"weather.TEMP" using 1:5 title "Outside Temp" with lines, 
"weather.TEMP" using 1:12 title "Wind Chill" with lines, "weather.TEMP" 
using 1:7 title "Inside RH" with lines, "weather.TEMP" using 1:8 title 
"Outside RH" with lines, "weather.TEMP" using 1:6 title "Dew Point" with 
lines;
set output "windspeed.png"
set xlabel "Time"
set ylabel "MPH"
plot "weather.TEMP" using 1:9 title "Wind Speed" with lines
reset
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Attached is the image that I'm getting.
For some reason only half of the xtic labels are appearing.

Thanx guys!!!
G