I've just had a quick search for this and didn't find anything, so I hope I haven't missed a topic!
Anyway, I'd had Plogger running on my band's web site for a while (http://www.ladyrain.co.uk/gallery/index.php) - no fancy design changes or anything like that - pretty much straight out of the box.
It's been running fine up until recently when certain albums haven't been displaying. The photos are there as they display in the admin panel and if you manually enter the numbers for the albums they display, however they don't seem to want to on the front end of things.
To see what I mean go to http://www.ladyrain.co.uk/gallery/index.php and click on 'Archive Live Photos' (under which it says there are 5 albums, which there are/should be) and then when you're in that collection, only 2 albums display.