SESSIONS, a weird, funny yet strange error happens to wrong peopl e...

hello guys... On one of our websites, where we use sessions, a funny error have happened. <err> Warning: open(/tmp/sess_b5ad1e0878dee63fa8a780df44af3ea7, O_RDWR) failed: File exists (17) in page.japaninc.inc on line 109 </err> The funny side of it is that no one has ever seen it except our manager (what a luck) from his PC only. I guess, we developers, visit our art-work much more often than our manager... She's seen it twice already, first time was a month-two ago and now again. I ignored it the first time, I though - well, happens... But now I start to think it is a bit weird (and dangerous for carrier). Any of you have any idea why this "rare" error keeps happening on her browser and NEVER on any of developer's? (nor even any other employee of our 200> company ever complained)... What to fix? Sincerely, Maxim Maletsky Webmaster, J-Door.com / J@pan Inc. LINC Media, Inc. TEL: 03-3499-2175 x 1271 FAX: 03-3499-3109 maxim@j-door.com www.j-door.com www.japaninc.net www.lincmedia.co.jp