When creating a bug the required field labels have a red star and the input/selection fields are highlighted yellow (using the default CSS). The "Version:" label has a red star but the selection box doesn't have class="required" specified and is therefore not highlighted. The selection box is also missing the attribute: aria-required="true". It appears that applying those attributes to the this was missed when the highlighting was introduced in bug 204106. I have seen this in my Bugzilla 4.4 installation in CentOS 6.4 with Apache, and I can see this problem on the page I am using to enter this bug.
Created attachment 8341127 [details] [diff] [review] patch, v1
Committing to: bzr+ssh://firstname.lastname@example.org/bugzilla/trunk/ modified template/en/default/bug/create/create.html.tmpl Committed revision 8828. Committing to: bzr+ssh://email@example.com/bugzilla/4.4/ modified template/en/default/bug/create/create.html.tmpl Committed revision 8642.