221829 - perform undo in subject line has weird character in title bar

Status: RESOLVED DUPLICATE of bug 147625

(MailNews Core :: Composition, defect)

Description

[Joel Gedalius]

User-Agent:       / (Windows; U; Windows NT 5.1; en-US; rv:1.6a) Gecko/20031010
Build Identifier: / (Windows; U; Windows NT 5.1; en-US; rv:1.6a) Gecko/20031010

Entering a subject line then performing undo (either through CTRL-Z or
Edit->Undo) results in a block character appearing in the title bar "Compose:
[BLOCKCHAR]"  It's those block chars that appear for weird ascii values. 
Probably "Compose: (no subject)" or "Compose" should appear instead.

Reproducible: Always

Steps to Reproduce:
1. Go to Compose message
2. Enter some text in the subject line (notice the title bar)
3. Hit Control+Z or Edit->Undo and notice the block in the title bar

Actual Results:  
Block in title bar

Expected Results:  
"Compose: (no subject)" or "Compose"

Comment 1

[Christian :Biesinger (don't email me, ping me on IRC)]

*** This bug has been marked as a duplicate of 147625 ***