Comment 2 for bug 765855

Also present in maverick, the difference being that the function key has no effect:

$ apt-cache policy thunderbird
thunderbird:
  Installed: 3.1.8+build3+nobinonly-0ubuntu0.10.10.1
  Candidate: 3.1.8+build3+nobinonly-0ubuntu0.10.10.1
  Version table:
 *** 3.1.8+build3+nobinonly-0ubuntu0.10.10.1 0
        500 http://fi.archive.ubuntu.com/ubuntu/ maverick-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu/ maverick-security/main amd64 Packages
        100 /var/lib/dpkg/status
     3.1.4+build2+nobinonly-0ubuntu3 0
        500 http://fi.archive.ubuntu.com/ubuntu/ maverick/main amd64 Packages

$ sudo dmidecode -t system; lsb_release -a
# dmidecode 2.9
SMBIOS 2.4 present.

Handle 0x002F, DMI type 1, 27 bytes
System Information
        Manufacturer: Apple Inc.
        Product Name: MacBookPro8,2
        Version: 1.0
        Serial Number: C02FC3XKDF8Y
        UUID: F9FC7839-617E-8259-A482-A8F6ED353E1E
        Wake-up Type: Power Switch
        SKU Number: System SKU#
        Family: MacBook Pro

Handle 0x0047, DMI type 12, 5 bytes
System Configuration Options

Handle 0x004A, DMI type 32, 20 bytes
System Boot Information
        Status: No errors detected

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 10.10
Release: 10.10
Codename: maverick