This morning I discovered a bug in Windows Vista – an OS which I rarely use, only if something really requires 100% Windows. I was exporting photos from Adobe Lightroom and while I was watching the files being written into a folder I also wanted to know the filesize of the exported files. If you are standing on an existing file and then click on a file being written it will report a negative filesize for the new file. That’s a minor bug, but if you then click on any other existing file in that folder, it reports for every file a negative size.