On an upgraded 5.0 from 4.6.3, It appears that there is a bug in acs-admin/install/install/ when trying to update from OACS server.
error "Unterminated element" at position 672
"56">
<br />
<input type=submit value="Search" name="t">
</f <--Error-- orm>
<hr noshade>
<address><a href="mailto:webmaster@openacs.org">"
while executing
"dom parse -simple [lindex $args 1]"
(procedure "xml_parse" line 4)
invoked from within
"xml_parse -persist $manifest"
(procedure "apm_get_package_repository" line 30)
invoked from within
"apm_get_package_repository -repository_url $repository_url -array repository"
("uplevel" body line 30)
invoked from within
"uplevel {