#413 Serious word wrap problem in SquirrelMail 1.4.7

[Aleksander Adamowski]

There is a very serious problem in SquirrelMail, where
certain lines aren't displayed at all in plain text
messages.

In our case, those messages are usually encoded in
ISO-8859-2, while the configured default charset for
SquirrelMail is UTF-8. Squirrelmail recodes them
correctly when displaying, but some lines are "eaten"

After debugging I've discovered that the problem is
located in functions/strings.php, in the sqWordWrap()
function.

On the problematic lines, the following regular
expression doesn't match at all:

ereg("^([\t >]*)([^\t >].*)?$", $line, $regs);

So the lines are assumed to be empty, although they
contain text.

As a result, the text isn't displayed - an empty line
is displayed instead.

The fix that works around the issue for me is replacing
this code:

$words = '';

...with this code:

$words = explode(' ', $line);

I suppose that this could break something so a
SquirrelMail developer should review this fix.

I'm attaching a patch and a test message that triggers
this bug (remember to configure your SquirrelMail
installation for UTF-8 charset before testing).

[Aleksander Adamowski]

Patch for line-eating word wrap bug

[Aleksander Adamowski]

Test message that has one line from its body eaten