I also have about 95% of my movies as TS folders.(approx. 120). I have not had a single problem with Plex crashing. When I went to SL I did have the problem of the movie freezing and no audio but the Plex forums have a workaround for that and that issue is now fixed.
Since all your movies scraped correctly I am assuming that your file structure is correct. Could you post a screen shot of your directory?
I'll look over my Plex settings when I get home and see if anything stands out.
According to what I have read on the Plex forums it seems that the problem is only in Movie mode where Plex picks the wrong file to play (for example VTS_04_0.VOB instead of VIDEO_TS.IFO); supposedly browsing directly to the folder and selecting the proper file works (but I haven't tried that on all of the movies, only 1 or 2 and it does seem to work that way). Here is a snippet of my library:
Danny-2:Movies dwhitti$ ls -lR
total 0
drwxr-xr-x 3 dwhitti dwhitti 102 Sep 14 20:49 Diamonds Are Forever (1971)
drwxr-xr-x 3 dwhitti dwhitti 102 Apr 2 20:57 Die Another Day (2002)
./Diamonds Are Forever (1971):
total 0
drwxr-xr-x 36 dwhitti dwhitti 1224 Mar 31 20:42 VIDEO_TS
./Diamonds Are Forever (1971)/VIDEO_TS:
total 14259232
-rw-r--r-- 1 dwhitti dwhitti 22528 Mar 31 20:42 VIDEO_TS.BUP
-rw-r--r-- 1 dwhitti dwhitti 22528 Mar 31 20:42 VIDEO_TS.IFO
-rw-r--r-- 1 dwhitti dwhitti 16384 Mar 31 20:42 VTS_01_0.BUP
-rw-r--r-- 1 dwhitti dwhitti 16384 Mar 31 20:42 VTS_01_0.IFO
-rw-r--r-- 1 dwhitti dwhitti 800768 Mar 31 20:12 VTS_01_0.VOB
-rw-r--r-- 1 dwhitti dwhitti 116736 Mar 31 20:42 VTS_01_1.VOB
-rw-r--r-- 1 dwhitti dwhitti 16384 Mar 31 20:42 VTS_02_0.BUP
-rw-r--r-- 1 dwhitti dwhitti 16384 Mar 31 20:42 VTS_02_0.IFO
-rw-r--r-- 1 dwhitti dwhitti 5920768 Mar 31 20:12 VTS_02_1.VOB
-rw-r--r-- 1 dwhitti dwhitti 18432 Mar 31 20:42 VTS_03_0.BUP
-rw-r--r-- 1 dwhitti dwhitti 18432 Mar 31 20:42 VTS_03_0.IFO
-rw-r--r-- 1 dwhitti dwhitti 71481344 Mar 31 20:12 VTS_03_1.VOB
-rw-r--r-- 1 dwhitti dwhitti 102400 Mar 31 20:42 VTS_04_0.BUP
-rw-r--r-- 1 dwhitti dwhitti 102400 Mar 31 20:42 VTS_04_0.IFO
-rw-r--r-- 1 dwhitti dwhitti 344762368 Mar 31 20:42 VTS_04_0.VOB
-rw-r--r-- 1 dwhitti dwhitti 1073545216 Mar 31 20:18 VTS_04_1.VOB
-rw-r--r-- 1 dwhitti dwhitti 1073606656 Mar 31 20:22 VTS_04_2.VOB
-rw-r--r-- 1 dwhitti dwhitti 1073494016 Mar 31 20:25 VTS_04_3.VOB
-rw-r--r-- 1 dwhitti dwhitti 1073457152 Mar 31 20:29 VTS_04_4.VOB
-rw-r--r-- 1 dwhitti dwhitti 1073655808 Mar 31 20:33 VTS_04_5.VOB
-rw-r--r-- 1 dwhitti dwhitti 1073260544 Mar 31 20:38 VTS_04_6.VOB
-rw-r--r-- 1 dwhitti dwhitti 327378944 Mar 31 20:40 VTS_04_7.VOB
-rw-r--r-- 1 dwhitti dwhitti 16384 Mar 31 20:42 VTS_05_0.BUP
-rw-r--r-- 1 dwhitti dwhitti 16384 Mar 31 20:42 VTS_05_0.IFO
-rw-r--r-- 1 dwhitti dwhitti 31408128 Mar 31 20:42 VTS_05_1.VOB
-rw-r--r-- 1 dwhitti dwhitti 20480 Mar 31 20:42 VTS_06_0.BUP
-rw-r--r-- 1 dwhitti dwhitti 20480 Mar 31 20:42 VTS_06_0.IFO
-rw-r--r-- 1 dwhitti dwhitti 76443648 Mar 31 20:42 VTS_06_1.VOB
-rw-r--r-- 1 dwhitti dwhitti 16384 Mar 31 20:42 VTS_07_0.BUP
-rw-r--r-- 1 dwhitti dwhitti 16384 Mar 31 20:42 VTS_07_0.IFO
-rw-r--r-- 1 dwhitti dwhitti 116736 Mar 31 20:42 VTS_07_1.VOB
-rw-r--r-- 1 dwhitti dwhitti 16384 Mar 31 20:42 VTS_08_0.BUP
-rw-r--r-- 1 dwhitti dwhitti 16384 Mar 31 20:42 VTS_08_0.IFO
-rw-r--r-- 1 dwhitti dwhitti 757760 Mar 31 20:40 VTS_08_1.VOB
./Die Another Day (2002):
total 0
drwxr-xr-x 33 dwhitti dwhitti 1122 Apr 2 21:30 VIDEO_TS
./Die Another Day (2002)/VIDEO_TS:
total 15059848
-rw-r--r-- 1 dwhitti dwhitti 18432 Apr 2 21:30 VIDEO_TS.BUP
-rw-r--r-- 1 dwhitti dwhitti 18432 Apr 2 21:30 VIDEO_TS.IFO
-rw-r--r-- 1 dwhitti dwhitti 69632 Apr 2 20:57 VIDEO_TS.VOB
-rw-r--r-- 1 dwhitti dwhitti 16384 Apr 2 21:30 VTS_01_0.BUP
-rw-r--r-- 1 dwhitti dwhitti 16384 Apr 2 21:30 VTS_01_0.IFO
-rw-r--r-- 1 dwhitti dwhitti 88395776 Apr 2 20:58 VTS_01_1.VOB
-rw-r--r-- 1 dwhitti dwhitti 18432 Apr 2 21:30 VTS_02_0.BUP
-rw-r--r-- 1 dwhitti dwhitti 18432 Apr 2 21:30 VTS_02_0.IFO
-rw-r--r-- 1 dwhitti dwhitti 16617472 Apr 2 21:30 VTS_02_1.VOB
-rw-r--r-- 1 dwhitti dwhitti 18432 Apr 2 21:30 VTS_03_0.BUP
-rw-r--r-- 1 dwhitti dwhitti 18432 Apr 2 21:30 VTS_03_0.IFO
-rw-r--r-- 1 dwhitti dwhitti 10240 Apr 2 20:58 VTS_03_1.VOB
-rw-r--r-- 1 dwhitti dwhitti 104448 Apr 2 21:30 VTS_04_0.BUP
-rw-r--r-- 1 dwhitti dwhitti 104448 Apr 2 21:30 VTS_04_0.IFO
-rw-r--r-- 1 dwhitti dwhitti 91885568 Apr 2 21:30 VTS_04_0.VOB
-rw-r--r-- 1 dwhitti dwhitti 1073709056 Apr 2 21:05 VTS_04_1.VOB
-rw-r--r-- 1 dwhitti dwhitti 1073709056 Apr 2 21:10 VTS_04_2.VOB
-rw-r--r-- 1 dwhitti dwhitti 1073709056 Apr 2 21:13 VTS_04_3.VOB
-rw-r--r-- 1 dwhitti dwhitti 1073709056 Apr 2 21:16 VTS_04_4.VOB
-rw-r--r-- 1 dwhitti dwhitti 1073709056 Apr 2 21:20 VTS_04_5.VOB
-rw-r--r-- 1 dwhitti dwhitti 1073709056 Apr 2 21:24 VTS_04_6.VOB
-rw-r--r-- 1 dwhitti dwhitti 1040713728 Apr 2 21:30 VTS_04_7.VOB
-rw-r--r-- 1 dwhitti dwhitti 18432 Apr 2 21:30 VTS_05_0.BUP
-rw-r--r-- 1 dwhitti dwhitti 18432 Apr 2 21:30 VTS_05_0.IFO
-rw-r--r-- 1 dwhitti dwhitti 16699392 Apr 2 21:30 VTS_05_1.VOB
-rw-r--r-- 1 dwhitti dwhitti 18432 Apr 2 21:30 VTS_06_0.BUP
-rw-r--r-- 1 dwhitti dwhitti 18432 Apr 2 21:30 VTS_06_0.IFO
-rw-r--r-- 1 dwhitti dwhitti 655360 Apr 2 21:30 VTS_06_1.VOB
-rw-r--r-- 1 dwhitti dwhitti 18432 Apr 2 21:30 VTS_07_0.BUP
-rw-r--r-- 1 dwhitti dwhitti 18432 Apr 2 21:30 VTS_07_0.IFO
-rw-r--r-- 1 dwhitti dwhitti 12845056 Apr 2 21:30 VTS_07_1.VOB