Magento - Invalid argument supplied for foreach in toolbar.phtml

After adding a new theme and uploading a big number of records to a fresh Magento install, I see the following error in the log files:

Invalid argument supplied for foreach() in /home/content/07/6268407/html/app/design/frontend/MYTHEME/template/catalog/product/list/toolbar.phtml on line 63

After much digging around, I realized that this error is due to change in Magento on how the pagination works now in 1.4 as compared to earlier versions. The theme I used was clearly not compatible with Magento1.4 and hence this issue. To resolve this problem, here are the steps I took:

1. Create Template file for Pagination
Create a new file for handling pagination according to the new way. Create a new file called pager.phtml in the /template/catalog/product/list/ folder inside your theme folder. Now write the below code into this new file:

<?php if($this->getCollection()->getSize()): ?>
        <?php if($this->getLastPageNum()>1): ?>
        <td class="pages">
            <strong><?php echo $this->__('Page:') ?></strong>
            <ol>
            <?php if (!$this->isFirstPage()): ?>
                <li><a href="<?php echo $this->getPreviousPageUrl() ?>"><img src="<?php echo $this->getSkinUrl('images/pager_arrow_left.gif') ?>" alt="<?php echo $this->__('Previous Page'); ?>" /></a></li>
            <?php endif ?>
            <?php foreach ($this->getPages() as $_page): ?>
                <?php if ($this->isPageCurrent($_page)): ?>
                    <li><span class="on"><?php echo $_page ?></span></li>
                <?php else: ?>
                    <li><a href="<?php echo $this->getPageUrl($_page) ?>"><?php echo $_page ?></a></li>
                <?php endif ?>
            <?php endforeach;; ?>
            <?php if (!$this->isLastPage()): ?>
                <li><a href="<?php echo $this->getNextPageUrl() ?>"><img src="<?php echo $this->getSkinUrl('images/pager_arrow_right.gif') ?>" alt="<?php echo $this->__('Next Page'); ?>" /></a></li>
            <?php endif ?>
            </ol>
        </td>
        <?php endif; ?>
<?php endif ?>

2. Call this Pagination code in Layout
Edit the catalog layout xml file to include this new pagination code. Open the file catalog.xml in the /layout/ folder inside your theme folder. Now search for this line of code:

<block type="catalog/product_list_toolbar" name="product_list_toolbar" template="catalog/product/list/toolbar.phtml">

Below this line, add the following new line to call the pager file that you created in step 1 above:

<block type="page/html_pager" name="product_list_toolbar_pager" template="catalog/product/list/pager.phtml" />

3. Call this Pagination code in Toolbar
Edit the toolbar html file to include this new pagination code. Open the file toolbar.phtml in the /template/catalog/product/list/ folder inside your theme folder. Now search for the below block of code approximately around lines 42 - 63:

<?php if($this->getLastPageNum()>1 && is_array($this->getPages())): ?>
...
...
...
<?php endif; ?>

Now replace this block of code with the following single line of code:

<?php echo $this->getPagerHtml(); ?>

If you follow these 3 steps to the 'T' it should definitely resolve your problem!

To find out details of errors, please go through this post on Debugging Magento.