не запускаются программы

Права на указанные тобой проги проверь. Может ты рекурсивно поменял права доступа на /usr и выставил доступ только дляя рута.

saken@matador ~ $ xmule
Initialising xMule

OOPS! - Seems like xMule crashed
--== BACKTRACE FOLLOWS: ==--

(xmule:324): Pango-CRITICAL **: pango_font_metrics_ref: assertion `metrics != NULL' failed

(xmule:324): Pango-CRITICAL **: pango_font_metrics_get_ascent: assertion `metrics != NULL' failed

(xmule:324): Pango-CRITICAL **: pango_font_metrics_get_descent: assertion `metrics != NULL' failed

(xmule:324): Pango-CRITICAL **: pango_font_metrics_unref: assertion `metrics != NULL' failed
[0] xmule [0x8179283] | 0x8179283
[1] wxFatalSignalHandler | 0x408bc47b
[2] /lib/libpthread.so.0 [0x40adee61] | 0x40adee61
[3] [0xffffe420] | 0xffffe420
[4] /usr/lib/libpangocairo-1.0.so.0 [0x403cf380] | 0x403cf380
[5] pango_font_get_metrics | 0x403de998
[6] pango_layout_line_get_extents | 0x403eae90
[7] /usr/lib/libpango-1.0.so.0 [0x403eb04f] | 0x403eb04f
[8] /usr/lib/libpango-1.0.so.0 [0x403ec358] | 0x403ec358
[9] gtk_text_layout_get_line_display | 0x401e219e
[10] /usr/lib/libgtk-x11-2.0.so.0 [0x401e2cea] | 0x401e2cea
[11] gtk_text_layout_wrap | 0x401dfdef
[12] /usr/lib/libgtk-x11-2.0.so.0 [0x401cb379] | 0x401cb379
[13] gtk_text_layout_validate_yrange | 0x401e0a3f
[14] /usr/lib/libgtk-x11-2.0.so.0 [0x401f404d] | 0x401f404d
[15] /usr/lib/libgtk-x11-2.0.so.0 [0x401f3726] | 0x401f3726
[16] /usr/lib/libgtk-x11-2.0.so.0 [0x401556ec] | 0x401556ec
[17] /usr/lib/libgobject-2.0.so.0 [0x4045cd69] | 0x4045cd69
[18] g_closure_invoke | 0x4045ca2b
[19] /usr/lib/libgobject-2.0.so.0 [0x404717cb] | 0x404717cb
[20] g_signal_emit_valist | 0x40472ba8
[21] g_signal_emit | 0x40472e96
[22] gtk_widget_set_scroll_adjustments | 0x4024cf23
[23] /usr/lib/libgtk-x11-2.0.so.0 [0x40197c70] | 0x40197c70
[24] g_cclosure_marshal_VOID__OBJECT | 0x40473d85
[25] /usr/lib/libgobject-2.0.so.0 [0x4045cd69] | 0x4045cd69
[26] g_closure_invoke | 0x4045ca2b
[27] /usr/lib/libgobject-2.0.so.0 [0x40471557] | 0x40471557
[28] g_signal_emit_valist | 0x40472ba8
[29] g_signal_emit | 0x40472e96
[30] gtk_container_add | 0x400bc9a1
[31] wxTextCtrl::Create(wxWindow*, int, wxString const&, wxPoint const&, wxSize const&, long, wxValidator const&, wxString const&) | 0x40787439
[32] wxTextCtrl::wxTextCtrl(wxWindow*, int, wxString const&, wxPoint const&, wxSize const&, long, wxValidator const&, wxString const&) | 0x40787a98
[33] xmule [0x80e7b1f] | 0x80e7b1f
[34] xmule [0x81414ad] | 0x81414ad
[35] xmule [0x817b4f4] | 0x817b4f4
[36] xmule [0x817be13] | 0x817be13
[37] xmule [0x8174687] | 0x8174687
[38] wxEntry(int, char**) | 0x4073baa3
[39] xmule [0x8173cbe] | 0x8173cbe
[40] __libc_start_main | 0x40b3a3d0
[41] wxNotebook::SetSelection(int) | 0x8067121
Aborted
saken@matador ~ $ sylpheed-claws
Segmentation fault
saken@matador ~ $ d4x
Segmentation fault