Hi all, in Centos 5.2 I could click on and xls file in thunderbird and it would use oomath to open the file. I could do on the command line "oomath file.xls" and it open the file and show it to me no problem either. now in 5.3 (x86_64) in either case above I get a "filter selection" screen. Most of the selections are for Word not excel and if I choose an excel item my oomath opens with a blank page. Any ideas? Jerry