Sophos Causing Mac OS Abort/Restarts

Sophos has caused 4 restarts in the past 2 days ... There have been posts about this problem in the past, with the answer being that the problem has been resolved in the latest version, but I am on the latest version (9.2.4) and it is still happening. Copy of Mac abort report:

*** Panic Report ***

panic(cpu 2 caller 0xffffff80239453eb): "vnode_rele_ext: vp 0xffffff8046b205a0 usecount -ve : -1. v_tag = 16, v_type = 1, v_flag = 84800."@/SourceCache/xnu/xnu-2782.1.97/bsd/vfs/vfs_subr.c:1867

Backtrace (CPU 2), Frame : Return Address

0xffffff812dde33d0 : 0xffffff802373a811

0xffffff812dde3450 : 0xffffff80239453eb

0xffffff812dde3490 : 0xffffff7fa3e1958f

0xffffff812dde34b0 : 0xffffff7fa3e18de2

0xffffff812dde3800 : 0xffffff7fa3e1ae94

0xffffff812dde3840 : 0xffffff8023ba2c66

0xffffff812dde38a0 : 0xffffff802394834a

0xffffff812dde38f0 : 0xffffff8023966ebe

0xffffff812dde3990 : 0xffffff8023952688

0xffffff812dde3bd0 : 0xffffff8023953260

0xffffff812dde3f50 : 0xffffff8023c4dcb2

0xffffff812dde3fb0 : 0xffffff802383ac46

     Kernel Extensions in backtrace:

         com.sophos.kext.sav(9.2.50)[D9AF65D9-4A18-3B20-86BB-17DEBC7D5852]@0xffffff7fa3e18000->0xffffff7fa3e1cfff

BSD process name corresponding to current thread: mds_stores

Mac OS version:

14B25

Kernel version:

Darwin Kernel Version 14.0.0: Fri Sep 19 00:26:44 PDT 2014; root:xnu-2782.1.97~2/RELEASE_X86_64

Kernel UUID: 89E10306-BC78-3A3B-955C-7C4922577E61

Kernel slide:     0x0000000023400000

Kernel text base: 0xffffff8023600000

__HIB text base: 0xffffff8023500000

System model name: MacBookAir5,2 (Mac-2E6FAB96566FE58C)

System uptime in nanoseconds: 28342824048697

last loaded kext at 11336649560858: com.apple.driver.AppleUSBCDC 4.2.2b5 (addr 0xffffff7fa602d000, size 20480)

last unloaded kext at 11396745628393: com.apple.driver.AppleUSBCDC       4.2.2b5 (addr 0xffffff7fa602d000, size 16384)

loaded kexts:

com.sophos.kext.sav      9.2.50

com.sophos.nke.swi        9.2.50