So, in checking whether macros still worked, I came across a crash.

The good news: crash is not the Instant Preview's cache's fault.

< This crashes due to the brush being modified before recording, and thus playback crashes.
< Here's the backtrace, must be an old crash proly.

< This one works... sorta.
< This is the funny result that I get from playback of the working macro.

I don't think anyone actually uses macros, so technically we could just disable the plug-in for 3.0 release if necessary. It needs redefinition anyway. (Like what problems we want it to solve, how it should be edited, etc.)