Hi,

I'm the author of Flexible Widgets. Thanks for mentioning the plugin.

Apparently You found a couple of bugs while testing it. I'll try to follow up on that and see if I can fix the issues for the next version.

So far, the plugin only supports the default WordPress widgets. Actually, it replaces them altogether. I'll see if I can wrap my head around another solution so it will be able to support custom widgets from other themes or plugins in a future version.