I think this is a new bug - I haven't noticed it before. I have downloaded build 177. This is using firefox. I used Innondb tables, with FK master-detail relationships. Here is the bug. If you click on the child table and search by some data, and then go to the master table and follow the child link. Rather than display all children as expected, it remembers the last search, and give the user a subset of the rows. Simply doing a "show all" at that point corrects the display. Clicking on a child hyperlink should always show all the children for that master.
By the way the last few releases of PHPrunner are really turning this into a great product!