RHEV-M GUI grids contain a lot of columns, therefore the width of each column is quite limited. hence, a column header text can easily get truncated if the user reduces the width of the column or if viewing the application in a locale that typically contain long texts (see the bugs that were closed as duplicate of bug 915950 in order to understand the scale of the problem). a solution this problem in the form of tool-tips that appear when hovering on a column-header has been suggested and discussed: https://post-office.corp.redhat.com/mailman/private/rhev-devel/2013-April/msg00253.html
*** This bug has been marked as a duplicate of bug 956378 ***
*** Bug 1010110 has been marked as a duplicate of this bug. ***