I haven't had any problems with the Thumbnail size until I created a new page. We are an online art gallery http://www.lightspacetime.com and each month we have an exhibition. All of the art is of varying sizes see http://www.lightspacetime.com/figurative-exhibition-december-2010/ and all of the Thumbnails are the same size. This month, same thing, all of the art is varying sizes http://www.lightspacetime.com/landscapes-exhibition-january-2011/ but now the Thumbnails are different sizes. I have checked and rechecked all of the settings and there is no difference between the two months.
Based on past Threads I also tried and created new Thumbnails and I also tried to resize them in the Manage Galleries Section. Any ideas? Thanks in advance for your help.