incorrect layout of "Assigned To Me" gadget

After an upgrade from JIRA 6.0.2 to JIRA 6.0.6 the layout of the "Assigned To Me" gadget is not correct. I tested this with Firefox and Internet Explorer in different versions. Firefox and IE 10 show the expected layout but don't show all issues because the gadget height is too low. In IE 8 the layout is screwed completely (this version is not critical for me).