escape not working with active record and Oracle

[eluser]Unknown[/eluser]
This is my first CI project. one reason I choose CI what for the cross DB library and the active records. I started out the project with MySql and then had t switch to Oracle.

The active record is not escaping an apostrophe. like in the string "you can't do that."

The code looks simple:

Code:

$comment = $this->input->post('CommentsDenial');
$this->db->set('REQ_DENY_COMMENT_DESC', $comment );

$this->db->where('REQ_OID_NBR', $reqId);
$dbRet = $this->db->update('REQUEST');

I get the error:
A PHP Error was encountered

Severity: Warning
Message: ociparse() [function.ociparse]: ORA-01756: quoted string not properly terminated
Filename: oci8/oci8_driver.php
Line Number: 186

I even tried to call escape first.

Code:

$this->db->set('REQ_DENY_COMMENT_DESC', $this->db->escape($comment) );

With a few debug statements I got this:

Code:

echo $comment . "<BR>";
echo $this->db->escape($comment)  . "<BR>";

Dale Pickering said on (09/15/2010 5:06 PM): you can't do that.
'Dale Pickering said on (09/15/2010 5:06 PM): you can't do that.'

All escape did was place single quotes around the whole string. the Apostrophe was not escaped!

So am I missing some settings or is this a bug (maybe with the oci8 driver)?