I dont know why it does this, But i downloaded JED beta 95 and I still get another error that I saw in beta 94. It says :
EInvalidOp: Invalid floating point operation at 7D10AA6D

Jed 0.95 beta
D3DDevice RGB Emulation
P3DAPI 1
WFAPI 1
GameDir C:\Program Files\LucasArts\Jedi Knight\Resource\
BaseDir E:\LEVEL MAKING\
Base 401000
Stack:
0079FC4C 004EB0DE 012E1C20 00427969 0079F6A4 004174F8 00417505 00000000
7D10AA6D 01301980 0079F6A4 0079F5EC 0079F5F8 0079F6A4 8162C52C 0079FC30
BFF76849 0079F6A4 0079FC30 0079F6C0 0079F67C 0079FB30 BFF76855 0079FC30
0079F68C BFF87FE9 0079F6A4 0079FC30 0079F6C0 0079F67C 004174F3 0079F838
0079F8C0 0000000E 00000000 C93DBEC0 83D71240 C97F7000 83D71278 0079F660
00000000 00000000 83D70F74 BAADDF8D 83D71240 946F10D8 83E5801C 946F10D0
83D70F74 946F10D8 83D7104C BAADDFF0 00000000 00000000 80210CAA BAAC7FB3
00000000 0FE28696 00000000 8351C114 00000000 0079F858 FFECBAD7 0079F6C0
0079F6A4 00000010 00000000 C0000090 00000002 00000000 7D10AA6D 00000001
00000000 CF97A090 0001001F 00000000 00000000 00000000 00000000 00000000
00000000 FFFF1377 FFFFB1BA FFFF0FFF 7D10AA6D 051A0167 0079F800 FFFF016F
DA920789 B02BAF18 7000C4EF CA35759E BDDBE226 ACF00000 AB9758A8 0000BFE1
F7D03360 BFFEE30B E7330000 AE4F6734 0000BFFD 00000000 00000000 F20B1520
BA635E30 D800BFFC 40000016 3FFFAA73 0000000A 00000000 000046CF 0000016F
0000016F 0079F838 0079F8C0 0000000E 0079F800 0079F7F8 00000001 0079F858
7D10AA6F 00000167 00010202 0079F79C 0000016F BFF7DFBF 0079F7B8 7D10A97A
0079F868 0079FB88 0079FB90 0079FB98 00000000 3FF00000 00000000 00000000
00000000 00000000 00000000 00000000 00000000 80000000 00000000 3FF00000
00000000 00000000 00000000 00000000 00000000 80000000 00000000 80000000
00000000 3FF00000 46E61967 6CC37428 00000000 00000000 00000000 00000000
00000000 00000000 60799A03 8E93B9D7 0079F7B8 46AEB3CE 9DBC44D9 46AEB3CE
1DBC44D9 0079F7E8 0079F8A8 00000003 0079F8E8 00000004 00000002 00000000
0079F92C 7D10ACB8 0079F868 0079F868 85F41D3E 0F7E81EA 80A99C63 8F7EA9A7
00000000 80000000 00000000 80000000 2797ABF1 243E01AD 17AE012E A43E28C3
00000000 80000000 00000000 80000000 26F2892D B82F3440 0374E169 B874FA9D
B14FF456 E2221C9B 00000000 00000000 3E743072 0FDCC5C3 760B8B9B 0FF5DE4E
00000000 00000000 00000000 3FF00000 3EB9A329 3F362ABA BF1A108D 0079FAE4
004A9998 00000000 00000000 00000000 00000000 00000000 00000000 1BD35BE7
3FD73465 3CF00F7E 3FE6C557 9455BEB6 004A99B0 0079FAE4 004AA652 00000000
40819000 6EC00000 C1DAEA90 00000000 00000000 0079F974 0079F9F4 0079FA74
0079FACC 0079FAC4 0079FABC 0079FC54 01342E74 004A956C 9455BE45 000089FC
0079F9D8 013E0FD5 00000001 0079F9A4 BFF7363B 000006B0 00000084 00000000
00970232 89D66F17 0000016F 0079F9B8 BFF71826 00000001 0079F9C0 BFF9440C
BFF719B8 000089F6 0079FC24 BFF7186D 164C0001 7956174F DEDC174F DEDC0002
8A0C00AC 174F7751 10058867 DEDC0001 10050002 00AC0000 00AC7BEF 166F166F
00260000 03000400 0524174F 8A263005 8A267BEF 74888A38 10058867 7BEF8A26

I dont know if its a problem with my level or what but I'm just gonna download Beta 85 or 92 or something.

At what point in time do you get that error (what command/feature are you using etc). You might mess around with some of the options settings if you get that when trying to use the 3d preview.

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"Sometimes nothing can be a real cool hand."
Have Lightsaber Will Travel

Well, these errors always happen when I set "fully lit" in options. I dont know if this is the problem but ive dont this every time to work on a dark sector. Sometimes when I go to 'light mode' it happeneds. Or it could be something else, its hard to tell.

Try messing around with the options. Especially look at the 3d preview rendering settings.

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"Sometimes nothing can be a real cool hand."
Have Lightsaber Will Travel