I am using the Dejavu theme (Mysitemyway)with Event Calendar Pro 2.0.11. The issue I am having is that the ajax monthly Next/Prev menu system breaks form and stacks oddly when a month does not have an event.
It seems rogue “p” and “br”s are being added for some reason. Not sure whey if an event exist for a month the layout works fine.
I’m not sure either, but I know some themes (and perhaps plugins) have a habit of re-ordering the stack of filters that are used to process output so that paragraphs and line breaks are applied across the board even when they aren’t desired.
I’m not sure why that would only be happening under the circumstances you have described, though. Was this problem resolved by switching to a default theme such as Twenty Twelve or Twenty Eleven?