After an upgrade from 4.2.0 to 4.3.3 we noticed our grids causing a browser freeze in IE7 (tested on multiple devices and even in compatibility mode). This same bug still occurs in 4.4.0 and has caused us to perform a rollback to 4.2.0.
I know what a bitch IE7 can be, but we have costumers that cannot change their default network browser, so IE7 support remains a requirement.
P.S. I also tested with a grid with only the url parameter set and the bug still occurred. Changing the version of jqGrid to 4.2.0 immediately fixed the issue.