Initially observed in: 1.9.3
Also Tested in: 1.9.4rc3 (the live example site)
The Unicode encoding for the subject line of the alert emails is incorrect, the supplied topic for the report was:
Which generates a subject line of:
[REVIEW] Topic Created "testing=testing_testing"
Although this is UTF-8 encoded, which is where the problem lies. The expected raw subject line obtained is:
The raw email subject line obtained is:
=?UTF-8?Q?[REVIEW] Topic Created "testing=3Dtesting_testing"?=
Spaces are not allowed in that encoding according to RFC 2047. They need to be encoded with an underscore. obviously any existing underscores need to be encoded to the hex code for that ascii character so that they aren't clobbered.
I've attached the email with the bad subject line, I'll try to attach a fixed copy after posting this.