Old theme stopped working after 3.4 upgrade, new theme keeps reverting to defaul

My new theme keeps switching back to the default theme every few hours or so.

This is an indication of a hosting problem. Ask your host if there’s any issues with the filesystem that they can find.

thanks I will try that.

Do I need to change the settings below? The theme developer for Weaver recommended I turn off Quick Cache and the Weaver theme lasted the day yesterday without reverting. When I came in at noon today, it was back to the default. Our host wrote:
“I noticed the wp-config.php file was updated at 9:25 today. This is in the config: define(‘ENABLE_CACHE’, TRUE);
The wp-content/cache folder also has a timestamp of today, at the same time.”
Should we change this setting to something else?

Our host wrote:
“I noticed the wp-config.php file was updated at 9:25 today. This is in the config: define(‘ENABLE_CACHE’, TRUE);

Did you update the wp-config.php file?

Not that I am aware of. I have been searching this setting on the Web and it appears it might be a default setting of newer versions of WordPress. But I am really not an expert at the back end of these things.

And I don’t know if this could be related to the theme reverting to the default or not. Just playing a guessing game at the moment.

I wonder if I should try 24 hours with a different theme than my one before the upgrade to 3.4 (K2) and my one since the upgrade (Weaver II and Weaver).

It seems to be a mystery. That is why I asked you if you changed the file. To locate the exact reason, I think you need to revert to the default theme and watch the behavior, as you said, at least for 24 hours. If it does not show extraordinary, mysterious behavior, definitely it is related to the theme you were using.

Also, I would suggest that you install the plugin TAC (Theme Authenticity Checker) and check the theme for bugs or malicious codes like Base64 or other problems.

I was not familiar with Base64, etc. Right now my host is taking a look and seeing if she can find something with the files, etc. Thank-you for posting and I will check back in here again after we do more investigating.

I installed TAC and it didn’t find any malicious code. Today I activated Twenty-Eleven and it reverted to default from this theme as well. It only seems to be happy if I keep the theme from before the upgrade activated – an old version of K2 which doesn’t interface completely in the dashboard since the 3.4 upgrade – nothing happens when clicking on widgets to edit, nothing happens when clicking on upload media in add new post. Until I can find someone to perhaps hire to fix this, I will just add and edit content in another theme and switch back to K2 for the site’s display.