Created attachment 541456 [details]
Screenshot

Version:
oVirt on dev env, last commit's hash: 6cc1e34544fde168a35d8f714ae7fa83b420c5ff

Reproduction Steps:
1. Select a running vm from the "Virtual Machines" tab's grid
2. Click on the "Edit" button
3. Change the "Memory Size" under the "General" tab from the "Edit Server Virtual Machine" dialog and click on "OK"

Result:
The following error message will appear with the literal "<br/>" tags instead of new lines:
"Error: Failed updating the properties of the VM. This may be caused either by:<br/>1. The values selected are not appropriate for the VM; or<br/>2. Its values cannot be updated while the VM is in UP state (Please shut down the VM in order to modify properties such as CPU or cluster)."