Client just shuts down

[Tanagor]

This client crash hasn't happened to me in a while, but I don't think that's because it's fixed. Historically for me it has come and gone.

The earliest record I have is in March and the latest is in September. As you can see sometimes it comes out of the blue, sometimes it repeats a few times quickly (e.g. Jul 07, Sep 19).

Times are GMT+10

[Sun Mar 14 17:14:19 2010] ERROR: String not found. (-2139062144)
[Tue Mar 23 21:45:10 2010] ERROR: String not found. (-1752729749)
[Sat May 15 11:46:20 2010] ERROR: String not found. (-745265493)
[Tue May 18 22:23:44 2010] ERROR: String not found. (2055109236)
[Sat May 29 04:02:06 2010] ERROR: String not found. (1600614778)
[Tue Jun 15 23:22:50 2010] ERROR: String not found. (-1987869815)
[Sun Jun 27 17:00:51 2010] ERROR: String not found. (2139062143)
[Mon Jun 28 20:33:48 2010] ERROR: String not found. (-2139062144)
[Wed Jul 07 17:59:56 2010] ERROR: String not found. (-2139062144)
[Wed Jul 07 18:42:53 2010] ERROR: String not found. (1849783400)
[Mon Jul 19 21:10:05 2010] ERROR: String not found. (1835425882)
[Mon Jul 19 21:18:11 2010] ERROR: String not found. (-2139062144)
[Mon Aug 30 20:39:00 2010] ERROR: String not found. (-2138996351)
[Thu Sep 02 21:07:43 2010] ERROR: String not found. (2139127936)
[Sun Sep 12 12:13:12 2010] ERROR: String not found. (2071558265)
[Sun Sep 19 21:06:27 2010] ERROR: String not found. (-2139324287)
[Sun Sep 19 21:10:31 2010] ERROR: String not found. (1600614778)
[Sun Sep 19 22:13:43 2010] ERROR: String not found. (1802797193)

Error codes converted to hex format below. The hex values don't mean anything to me but I thought they might be useful to devs.

Decimal 	Hex			Occurances
1600614778	0000 0000 5F67 717A	2
-1752729749	FFFF FFFF 9787 776B	1
1802797193	0000 0000 6B74 8089	1
1835425882	0000 0000 6D66 605A	1
1849783400	0000 0000 6E41 7468	1
-1987869815	FFFF FFFF 8983 8389	1
2055109236	0000 0000 7A7E 7A74	1
2071558265	0000 0000 7B79 7879	1
-2138996351	FFFF FFFF 8081 8181	1
2139062143	0000 0000 7F7F 7F7F	1
-2139062144	FFFF FFFF 8080 8080	4
2139127936	0000 0000 7F80 8080	1
-2139324287	FFFF FFFF 807C 8081	1
-745265493	FFFF FFFF D394 26AB	1

System config is:
Core 2 Duo E6550
3GB RAM
Nvidia GeForce 8800 GTS
Windows 7 Home Premium 64 bit

I run EQ through WinEQ2 and max FPS has been set to 60 for quite a long time. Have also used a few different UIs throughout the past few months.