Webuser Forums: Small problem with "Light Box 2" slideshow program

I've used "Light Box 2" a wee while ago on my web-comic, and it has proven to be a God-send. But I have a problem with it, and having seen it's use advocated in the latest issue of Web-User, I thought I'd ask here. The program seems to remember the size of my images that I load into it, even if I swap them around/rename them; it loads the white box at the same size as the image that was previously allocated that name, meaning the caption box below each image can be oddly deformed. I immediately thought it was a cache problem, so I performed a hard refresh, pressing ctrl-F5...to no avail. The only way I can get around this is to copy the folder filled with images and rename it "gallery2" or whatever, and re-code each and every link in the html to look for this new folder. There must be a simpler way of solving this, surely?