Sometime in the last month or so, this extension seems to have stopped working. I set up a few pages with the ifsysop tag and tested them successfully. However, I didn't return to the pages for a week or so, and when I came back, I can't get any of the tags to work. I've tried ifingroup, ifsysops, and ifanon, but they all just display on the page as plain text. I've even tried escaping the pipe symbols, thinking that might have something to do with it, but that didn't help. It sounds very similar to the problem that Hb1290 posted about 7 months ago, but I'm sure that the extension was working when I first set it up. Does anyone have any ideas?
Topic on Extension talk:UserFunctions/Flow
It is always good to add the versions of MW, PHP, and this extension to your issue reports. The extension is still working for me, but I am running it on a more "conservative" setup.