http://www.wireshark.org/docs/relnotes/wireshark-1.2.7.html#WhatsNewWhat's New
Bug Fixes
The following bugs have been fixed:
SNMPv3 Engine ID registration. (Bug 2426)
Open file dialog always displayed when clicking anywhere on Wireshark. (Bug 2478)
tshark reports wrong number of bytes on big dumpfiles with -z io,stat. (Bug 3205)
Negative INTEGER number displayed as positive number in SNMP dissector. (Bug 3230)
Add support for FT_BOOLEAN fields to wslua FieldInfo. (Bug 4049)
Wireshark crashes w/ GLib error when trying to play RTP stream. (Bug 4119)
Windows 2000 support has been restored. (Bug 4176)
Wrong dissection on be_cell_id_list for bssmap. (Bug 4437)
I/O Graph dropdown boxes not working correctly. (Bug 4487)
Runtime Error when right-clicking field and selecting "Filter Field Reference". (Bug 4522)
In GSM SMS PDU TPVPF showing wrong. (Bug 4524)
Profinet: May be wrong defined byte meaning. (Bug 4525)
GLib-CRITICAL ** Message. (Bug 4547)
Certain EDP display filters trigger Wireshark/tshark runtime error. (Bug 4563)
Some NCP frames trigger "Dissector bug, protocol NCP". (Bug 4565)
The encapsulation abbreviation "bluetooth-h4" is ambiguous. (Bug 4613)