When I originally downloaded WP-Cache from the plugin page for WP Cache 2, the download was for version 2.0.17. I stopped by several times over the course of the last few months and never noticed anything different. That's because I didn't scroll down and see the notes that were posted in the "downloading" area. I found out there's a much newer version available for download from that page and some notes about it at Security update, wp-cache 2.1.1.

I went through the change log (somewhere that I don't remember), and saw all the fixes that were put into place. The version I had didn't work with PHP5 without changing a specific line. That line is already changed in this version. Also, the mfunc function that was mentioned on his blog the last time I looked didn't work. The changes are supposed to fix it so that it does work. I will be testing that here in a few minutes, after I plug the code into my single.php and my page.php. I'll add an update to the end of this article to indicate whether it works or not.

Now, here's the more part. WP-Cache was never designed to work on Windows servers, or servers that didn't allow the writing of symbolic links. Another enterprising individual at twentythree7 created a way through the use of an additional step and a plugin. The only drawback is that it doesn't work with another plugin he mentions on his blog.

Update: It definitely works. I use the WP-Postviews plugin and I couldn't use WP-Cache with it before this. The counts wouldn't update. Now they will.

Update2: It works, but only temporarily. After that, a function error occurs. There's too many hoops to jump over to get the postviews to work right, so I'm not going to worry about it.