I'm using Build: 2.99.13.gcfa65

For XMLTV i grab the DVB-T stream using mheg5grab.sh to grab the data and mheg2xmltv-0.3.5 to generate a file freeview.xml.

To import freeview.xml into tvheadend (configured to ignore EIT data) i use a custom tv_grab_nz grabber that cats the freeview.xml file, this works fine for all the channels except one which has a one character title in the xml file.

The channel in question is "U"

******************************
<tv date="20120423040004 +1200" generator-info-name="mheg2xmltv"
source-info-name="DVB-T MHEG Stream">
<channel id="tv1.freeviewnz.tv">
<display-name>TV ONE</display-name>
<icon src="http://www.freeviewnz.tv/images/uploads/tv_one.jpg" />
</channel>
<channel id="tv2.freeviewnz.tv">
<display-name>TV2</display-name>
<icon src="http://www.freeviewnz.tv/images/uploads/tv_2.jpg" />
</channel>
<channel id="u.freeviewnz.tv">
<display-name>U</display-name>
<icon src="http://www.freeviewnz.tv/images/uploads/u-black.gif" />
</channel>*
<channel id="tvnz7.freeviewnz.tv">
<display-name>TVNZ 7</display-name>
<icon src="http://www.freeviewnz.tv/images/uploads/tvnz_7.jpg" />
</channel>
<channel id="tv3.freeviewnz.tv">
<display-name>TV3</display-name>
<icon src="http://www.freeviewnz.tv/images/uploads/tv_3.jpg" />
</channel>
<channel id="four.freeviewnz.tv">
<display-name>FOUR</display-name>
<icon src="http://www.freeviewnz.tv/images/uploads/stratos_502_x50.gif" />
</channel>
<channel id="tv3-plus1.freeviewnz.tv">
<display-name>TV3Plus1</display-name>
<icon src="http://www.freeviewnz.tv/images/uploads/freeview_3plus1_logo_107x35.jpg" />
</channel>
<channel id="c4.freeviewnz.tv">
<display-name>C4</display-name>
<icon src="http://www.freeviewnz.tv/images/uploads/logo-opg-c4-red.png" />
</channel>

******************************

In Tvheadend the XMLTV source will not list "U" as an option to assign to the channel, if i edit the xml file and change the line

<display-name>U</display-name>
to

<display-name>U2</display-name>

Run tv_grab_nz and then go back to the channel configuration i can now assign XMLTV source as U2 to channel U

It appears that tvheadend is ignoring one characther channel display names in the xmltv file.