Check ENVARC:Sys for def_ram.info and remove it. If it's not there, check your startup-sequence or user-startup for commands (or a call to a separate script) that copy some icon to RAM:Disk.info
I think virtually all replacement icon packages expect a screen taller than 200/256 pixels, so you're probably stuck with what you have unless you want to put up with distorted icons or interlace flicker.
You never use the RAM disk? You're passing on one of the Amiga's best features. I can't live without it. Give it a try for temporary storage (like unarchving stuff from Aminet) - you'll love it, I promise.
