I have encountered the bug while navigating records through the ZK web UI on PO in firefox. In chrome the error is not shown but it becomes dead slow. (screen shot attached)
Screenshot of bug
You seem to have CSS turned off.
Please don't fill out this field.
Victor Perez Juarez
The SF Tracker was migrate to https://adempiere.atlassian.net, please create the tracker into the new tracker system.