Product Review Submit Button Not Working – Fix Guide

That's a pretty big question — you might try contacting the creator of each plugin for advice on how to get this to work. If these are paid extensions getting some sort of guidance from the support team is reasonable. If these are not paid extension, then approaching the developers from a "hey, I know this isn't your problem, but I love your extension, do you have any advice how to get this working?" sometimes helps. Paid or free, being clear, friendly and respectful when requesting support always helps.

If I was debugging this for a client I'd start by, (as the comments mentioned), merging the two media.phtml files. Next, I'd run both extensions by themselves to make sure everything is working. Then I'd check if either rewrite or replaces the block associated with media.phtml (var_dump(get_class($this)); from the template), and I'd make sure that both extensions are actually replacing media.phtml and haven't just used the same name in a different folder location.

You also mentioned showInstagramImages "couldn't fetch the value". You didn't indicate is this threw a PHP error (indicative of a block replacement) or if this just didn't work. If it didn't work investigating the definition of showInstagramImages to determine why it didn't work would be useful.

Good luck, and come back with a new question when you've done a bit of legwork on the issue!

If you are in product page then you can get product object of your current product object. by registry variable

   $productObject=Mage::registry('current_product');
$_description = $productObject->getDescription();

current_product registry will give all the value of current product For check this goto

initProduct function of class Mage_Catalog_Helper_Product

 $product = Mage::getModel('catalog/product')
            ->setStoreId(Mage::app()->getStore()->getId())
            ->load($productId);
......

 Mage::register('current_product', $product);