Creating New Theme in Magento

http://www.magentocommerce.com/media/screencasts/designers-guide-1/view

Emails not sending in Magento 1.3.1

 As a temporary measure a fix can be issued in the form of editing core code.

1) Enter the root directory of your Magento store and enter

# mkdir app/code/local/Mage
# mkdir app/code/local/Mage/Core
# mkdir app/code/local/Mage/Core/Model
# mkdir app/code/local/Mage/Core/Model/Email
# cp app/code/core/Mage/Core/Model/Email/Template.php  app/code/local/Mage/Core/Model/Email/

2) Using your favourite editor open up Template.php and make changes at these lines

ini_set('SMTP', Mage::getStoreConfig('system/smtp/host'));
        ini_set('smtp_port', Mage::getStoreConfig('system/smtp/port'));
        $mail = $this->getMail();
        if (is_array($email)) {
            foreach ($email as $emailOne) {
+               # Fix for mini_sendmail
+                # $mail->addTo($emailOne, $name);
+                $mail->addTo($emailOne);
-                $mail->addTo($emailOne, $name);
            }
        } else {
+           # Fix for mini_sendmail
+           # $mail->addTo($email, '=?utf-8?B?'.base64_encode($name).'?=');
+           $mail->addTo($email);
-           $mail->addTo($email, '=?utf-8?B?'.base64_encode($name).'?=');
        }
        $this->setUseAbsoluteLinks(true);
        $text = $this->getProcessedTemplate($variables, true);

$mail->setSubject('=?utf-8?B?'.base64_encode($this->getProcessedTemplateSubject($variables)).'?=');
+       # Fix for mini_sendmail
+       # $mail->setFrom($this->getSenderEmail(), $this->getSenderName());
+       mail->setFrom($this->getSenderEmail());
-       $mail->setFrom($this->getSenderEmail(), $this->getSenderName());

3) Recompile (if using extension) to update includes
It is not a perfect solution, but should provide a fix until we find an alternative to mini_sendmail.

For more information click here

If the issue is not in 1.3.1 version then the solution can be found here 

Preventing Enter Button event from Form Submission

    if (document.layers)
        document.captureEvents(Event.KEYDOWN);
    document.onkeydown = function (evt) {
    var keyCode = evt ? (evt.which ? evt.which : evt.keyCode) : event.keyCode;
    if (keyCode == 13) {
        return false;
        //Your function here.
    }
    else
        return true;
    };

 OR

function preventEnter(evt) {
    var keyCode = evt ? (evt.which ? evt.which : evt.keyCode) : event.keyCode;
    if (keyCode == 13)
        return false;
    else
        return true;
};

Usage:  onkeydown="return preventEnter(event);"

How to add "date" type custom option for products and make it work?

 Many Magento users, like my company, have similar requirements to let customers choose date through pop-up calendar in the product view page. But Magento merely offer 2 groups of input type, “Text” and “Select”, in Catelog→Manage Products→Custom Options page by default. Is there any possibility for us to add the support for “Date” or “Date Time” input types?

http://www.magentocommerce.com/wiki/4_-_themes_and_template_customization/catalog/how_to_add

IE 9 Issues with Magento

The quick fix is to fool IE9 to “think” it’s acting as IE8 by adding a custom meta tag to the page header like so:

<meta http-equiv="X-UA-Compatible" content="IE=8" />

.htaccess approach

Add this to the end of your .htaccess file:

BrowserMatch MSIE best-standards-support Header set X-UA-Compatible IE=8 env=best-standards-support Latest update is the Prototype JS file is updated in latest version of Magento hope all the issues with IE9 will be fixed.