Have I read the related troubleshooter articles above before posting (which pages?)? Yes
Have I searched the tickets before posting? Yes
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Joomla! version: Joomla! 2.5.0 Stable [ Ember ] 24-Jan-2012 14:00 GMT
PHP version: 5.2.17
MySQL version: 5.1.39-log
Host: DreamHost
Admin Tools version: 2.2.a3
Description of my issue:
When performing an Extension Manager: Discover I receive the following messages:
Failed loading XML file
/home/[account]/[domain].com/administrator/modules/mod_atjupgrade/mod_atjupgrade.xml
XML: failed to load external entity "/home/[account]/[domain].com/administrator/modules/mod_atjupgrade/mod_atjupgrade.xml"
Additionally, my Joomla Control panel "home" shows all icons in one vertical column rather than in horizontal rows.
All this was observed using Admin Tools to upgrade site from 1.7.3 to 2.5.0. The tool is GREAT but I am wondering about these anomalies.
OTHER INFO: I am seeing this same behavior on a second site similarly upgraded. On a third site which was a new Joomla 2.5.0 install I get the XML error but the control panel is properly aligned.