hi all, this may seem to be a very a naive question. but this has been something which has me in a bit of speculation regarding linux. recently i have been coming across quite a few softwares which run perfectly well on redhat 7.3 but have problems on red hat 8.0 and 9.0 though no separate versions of the s/w are reported to be available for 8.0 and 9.0 (acrobat reader 5.0 for instance).i dont know whether it is because of the difference in kernels or something else but why is it that both the linux kernels and the various distros are evolving at a rate which is becoming uncatchable for, as far as i know, the linux users themselves, even if the evolution is catching pace it should be backward compatible, since one cannot be expected to keep installing a new version on a weekly or a fornightly basis. regards sumit ________________________________________________________________________ Yahoo! India Mobile: Download the latest polyphonic ringtones. Go to http://in.mobile.yahoo.com -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/