Wireshark 1.0.3 has been released and fixes several vulnerabilities that affect versions 0.9.7 to 1.0.2 inclusive.

The NCP dissector was susceptible to a number of problems, including buffer overflows and an infinite loop.
Versions affected: 0.9.7 to 1.0.2

Wireshark could crash while uncompressing zlib-compressed packet data.
Versions affected: 0.10.14 to 1.0.2

Wireshark could crash while reading a Tektronix .rf5 file.
Versions affected: 0.99.6 to 1.0.2

Wireshark's full announcement is available here and can be downloaded from here