[Plugin: W3 Total Cache] Widget plugin modifications to work with W3TC

I’m trying to get an out of development plugin, Configurable Tag Cloud Widget, to play nicely with w3tc when I turn on object caching. Works fine up until that is activated in w3tc.

I’ve got no problem making code modifications to get this plugin working with w3tc – I just don’ know what might be the incompatibility. Is there any guide or general info for plugin developers to ensure compatibility with w3tc?

A few more details: when object caching is activated the Tag Cloud Widget seems to show just once on the side-panel but any next page displayed and the widget disappears. No errors, just gone, like the content its trying to show isn’t there.

I see that this plugin makes use of wp_cache_get(), wp_cache_delete(), wp_cache_add() – perhaps how these are called is an issue?

Any help or thoughts appreciated, David