Page not cached - PHP Errors from views functions

I've searched the issue queue and could not find anything similar to my problem. I am using authcache + memcached. Caching works fine on some pages but on pages with views, I get errors regarding some views functions so it doesn't cache.

Example 1:

NO_CACHE: "Page not cached."
INFO: {"Reason":"PHP Error","type":2048,"message":"Declaration of views_handler_filter_term_node_tid::value_validate() should be compatible with that of views_handler_filter::value_validate()","file":"C:\\mysite\\sites\\all\\modules\\views\\modules\\taxonomy\\views_handler_filter_term_node_tid.inc","line":0}

Example 2:

NO_CACHE: "Page not cached."
INFO: {"Reason":"PHP Error","type":2048,"message":"Declaration of views_plugin_row::options_submit() should be compatible with that of views_plugin::options_submit()","file":"C:\\mysite\\sites\\all\\modules\\views\\plugins\\views_plugin_row.inc","line":0}

I'm using:
PHP 5.2.13
Drupal 6.14
authcache 6.x-1.0-rc2

I have turned off displaying errors in php.ini (and then restarted apache), but it didn't help. Please let me know if you have any ideas for debugging/fixing.

Thanks,
Kristen