Strange DB Crash

We are using INFORMIX 5.0.1 with Solaris 2.3 at a SUN SPARC-10 Workstation. Sometimes there occured a curios system crash. I've included a short part of the log file. Maybe someone can explain me the reason of this error. Is there a chance to avoid it or do I need a newer version with fixed bugs ? . . . . . . 15:54:38 Logical Log 169 Complete 16:05:00 Logical Log 170 Complete 16:10:16 bfcheck: bad page: pg_flags 0 != type 2, userp = 10001d8c, pid = 7743, uid = 5029 16:10:16 buffer header: 16:10:16 10027c6c: 00000000 00000000 00000000 10025e78 ........ ......^x 16:10:16 10027c7c: 10029a2c 1002952c 100274ec 00030000 ...,..., ..t..... 16:10:16 10027c8c: 7b0d0000 00100807 1003f800 00000000 {....... ........ 16:10:16 10027c9c: 00000000 00010000 1002a494 01000000 ........ ........ 16:10:16 page header: 16:10:16 1003f800: 00100807 001e052b 00000000 001807e4 .......+ ........ 16:10:16 1003f810: 00000000 00000000 ........ 16:10:16 slot table and stamp: 16:10:16 1003fffc: 001e052b ...+ 16:10:16 tblspace header error: 16:10:16 10019128: 00000000 00000000 00000000 00000000 ........ ........ 16:10:16 10019138: 00010000 010007fa 00100807 00000000 ........ ........ 16:10:16 10019148: 00000000 00000000 00000000 00000000 ........ ........ 16:10:16 10019158: 00000000 00000000 00000000 00000000 ........ ........ 16:10:16 10019168: 00000000 00000000 00000000 00000000 ........ ........ 16:10:16 10019178: 00000000 00000000 00000000 00000000 ........ ........ . . . . . . [seeming endless] ---Thomas Kudrass kudrass@dvs1.informatik.th-darmstadt.de