Strange bug using GIF file type

This plugin seems to work great barring one strange bug I found…

I used Random Banner to create two banner areas on my site. One using shortcode in a text widget to display 300×300 size… And another using shortcode in a text widget to create 728×90 size.

Both work fine except if I load a GIF file type into the category that displays the 728 size banners the banner won’t display anything (it says no ads to display). If I only load JPG files it works fine but as soon as I load a GIF into that category it stops working…even the JPG files won’t display. To fix it I have to delete every file (including JPG files) from that category and load them all back in again….deleting just the GIF files doesn’t work…I must delete all the files in the category and start over.

Strangely the 300×300 banner works just fine with a mix of JPG and GIF files. The shortcode is identical for both except for the category name. I even tried switching the 300×300 shortcode into the location where the 728 banner displays and it still works….so it’s nothing to do with where I display the banner on my site.

I tried loading only GIF files, I tried changing the options in the shortcode to different settings, I tried putting the banner in different places on the site. I tried loading the banners into the posts directly and they still won’t work if there’s at least one GIF file loaded into that category.

It’s just something to do with loading GIF files at 728×90 breaks the functionality of this plugin.