We switched to latest git revision of gstreamer for our software, previously we used a Gstreamer revision obtained in november 2008. The latest git revision seems to leak, some leaks are known and linked to gstrtpbin but others are new :

==00:00:04:28.551 12105== 124 bytes in 1 blocks are still reachable in loss record 27,243 of 27,789
==00:00:04:28.551 12105==    at 0x4022BA2: calloc (vg_replace_malloc.c:397)
==00:00:04:28.551 12105==    by 0x457B30B: g_malloc0 (gmem.c:151)
==00:00:04:28.551 12105==    by 0x45748EF: g_main_context_new (gmain.c:454)
==00:00:04:28.551 12105==    by 0x4574B1C: g_main_context_default (gmain.c:537)
==00:00:04:28.551 12105==    by 0x4574CF4: g_main_context_wakeup (gmain.c:3065)
==00:00:04:28.551 12105==    by 0x435CCA6: gst_bus_post (gstbus.c:308)
==00:00:04:28.551 12105==    by 0x43617B0: gst_element_post_message (gstelement.c:1567)
==00:00:04:28.551 12105==    by 0x4361A78: gst_element_continue_state (gstelement.c:2167)
==00:00:04:28.551 12105==    by 0x4361BA3: gst_element_change_state (gstelement.c:2464)
==00:00:04:28.551 12105==    by 0x4361FD6: gst_element_set_state_func (gstelement.c:2377)
==00:00:04:28.551 12105==    by 0x43613CE: gst_element_set_state (gstelement.c:2280)