I know I'm probably a little late breaking with this news, but the latest version of CataBlog has two rendering bugs in WordPress 3.8. But don't worry too much, none of these bugs are fatal. I will try and fix them soon, but I cannot give a timeline since I'm very busy these days.
The Multifile Upload Button renders improperly. Although it may seem the button is broken, it is not, simply click the button and select your images. If you do get an error, please double check the selected file's size is within your server's configured limits.
The Edit CataBlog Item panel renders the description field too low. This is really just an inconvenience, especially for shorter monitors that will have to scroll to accommodate for the extra height.
Both these rendering errors are relatively easy fixes that I will try and patch up and release soon. Thanks again for supporting CataBlog and being apart of its community.