I too am having a similar problem, on multiple installs.
I have just created a completely fresh install (on localhost), with no plugins other than LBP (latest ver) and running the default twentytwelve theme.
I had the following problems:
– upload of images failed initially when LBP enabled
– if I select to show only certain images from page in a gallery, all are displayed regardless – i.e. it’s not respecting IDs in shortcode
– when I go back in to edit the gallery settings, no images appear, and ‘Update gallery’ button greyed out
– various ‘Undefined variable/index’ notices
On another couple of sites with bespoke themes, the styling was out too, but that’s quite possibly just something local (although never had too much of a problem in the past).
Let me know if I can help at all with more details/testing. Thanks for the plugin to date – I’ve used it on a lot of my sites!