by davidben@davidben.net:

What does 'go version' print?
go version go1.3.1 darwin/amd64

What steps reproduce the problem?
If possible, include a link to a program on play.golang.org.

1. Run this program locally https://play.golang.org/p/BMNcHrJ1D5
2. Run dig txt 20120113._domainkey.gmail.com

What happened?
The Go program prints:
2014/08/16 16:23:06 lookup 20120113._domainkey.gmail.com on [192.168.1.1]:53: no such
host
2014/08/16 16:23:06 []

What should have happened instead?
The Go program should have found something. 

Please provide any additional information below.
I looked at a packet dump, and it looks like the problem is that TXT record contains two
strings. (For this particular use, the strings within a record are supposed to be
concatenated[1]. I don't know if this is true in general. If not, I guess there may need
to be a [][]string version of net.LookupTXT or something.)

unpackRR[2] in dnsmsg.go returns only the header if it fails to parse the entire body.
It tries to parse a dnsRR_TXT, but that only contains a string rather than a []string
and its Walk method only pulls one string out[3].

Per [4], a TXT-DATA contains "One or more <character-string>s.".

[1] https://tools.ietf.org/html/rfc6376#section-3.6.2.2
[2]
https://code.google.com/p/go/codesearch#go/src/pkg/net/dnsmsg.go&;q=unpackRR&sq=package:go&l=706
[3]
https://code.google.com/p/go/codesearch#go/src/pkg/net/dnsmsg.go&;q=unpackRR&sq=package:go&l=299
[4] https://tools.ietf.org/html/rfc1035#section-3.3.14