I downloaded a nebula pack off of Singh's Background Emporium, but when I pasted it into the stars.tbl, it crashed FRED (strangely, Freespace Open isn't affected at all). At first, I thought it was because the table had too many entries, but even when I reduced it (a lot) it crashed FRED. So I'm wondering what it is about these nebulas that makes FRED angry.
The pack is a variant of Lightspeed's Nebula Pack, with the effects as .dds rather than .tga. I'm also running FSOpen 3.6.9 RC5, and using 3.6.9 FRED2 as well.
UPDATE: This is really odd. I don't think the stars.tbl is causing this after all....... EVERY SINGLE version of FRED I have is malfunctioning!

NONE of them are able to do anything than say they have "encountered a problem and need to close". I tried FRED 3.6.9 RC5, 3.6.9 RC3, 3.6.8 CVS, 3.6.7, and retail FRED. No matter which mod is selected, no matter which version I use, they all crash. What is goin on here?