PHP 5.4 support?

Hi all,

I am using the Twenty Eleven theme for WordPress and am hosted through Bluehost. I received this from Bluehost recently:

“If you’re not certain of your sites compatibility with PHP 5.4, you can quickly and easily test it by changing your account to PHP 5.4 single using the outlined steps below. If, after changing your PHP version to 5.4 and your site looks normal and operates without any errors then your site is compatible. If you update to PHP 5.4 and you find your site showing errors or a blank white screen that is a good sign that something in your site is not compatible. Most commonly these are plug-ins or themes that need to be updated. Switch the PHP version back to 5.2 and login to your admin panel and check for any available updates. If none are available you will need to check with the plug-ins/theme developer to see if they have compatibility with PHP 5.4.”

Following their instructions, when I change it to 5.4 and check my site, the dashboard is completely blank (the front-end of the site appears normal). I switch it back to 5.2 and it works fine. I tried deactivating every plug-in and it didn’t make a difference, so I’m wondering if it’s my theme or the version of WordPress I’m using.

I’m currently using the 1.5 version of Twenty Eleven — there is a 1.7 version available.
I’m currently using the 3.3.1 version of WordPress — there is a 3.8 version available.

But if I update these, I know I’ll have to make some adjustments because I changed some code without using a child theme (stupid on my part, I know).

Before I go ahead with the updates, I wanted to ask if anyone knows if one of these versions (either of WordPress or Twenty Eleven) is causing the problem — or if there’s another issue I may be overlooking.

Thanks in advance for any help!