The only relevant patch I can think of that my hack uses that might affect this is the Bounce Block Unrestrictor; however, when I apply this to my clean test ROM, I can still edit $00F05C as normal.
Anyone know of any other patches that might redirect around $00F05C, or why my table might be uneditable and yet still somehow function? It almost seems as if
Guh. Turns out that I had applied the All Switch Blocks Have Power-Ups Patch, which apparently redirects and replaces all of the game's bounce block related tables. Not sure if a stronger notice that this effect takes places is warranted with that patch, but it might be worth considering since the patch itself is a little vague about what it is doing.
[?] Miscellaneous Helpful Hints
If I moderated your hack, there was apparently a 90 percent chance it was rejected.