Which plugin revision? Glide64 for PJ64? That's because it was made by Zilmar and he doesn't really know about graphic plugins (he has admitted it himself). He merged the 3 Glide64 DLLs into 1 DLL (imperfectly, introducing many bugs and killing compatibility with 3Dfx cards), and made some tweaks, such as changing the texture path to be the same as Jabo's (without documenting it anywhere), merging Glide64.ini with Project64.rdb (making it a nightmare to maintain the file), and removing the screen fill setting (why?). But he didn't bother removing the "Get framebuffer info" option, which only works on Mupen64 :doh:
The best Zilmar Spec. version of Glide64 to use is Glide64 Final (May 2012), although I can't find a download link to that version (I have it on my PC). The one on Google Code is Glide64 Final (Dec 2011).