Hi there, I have a macbook pro running macosx 10.5.5, but lately a have some troubles with my running system. Some of the symptoms include random freezes, crashes, and problems with X11. I think it would be healthy to d a clean install, however the problem is that I have installed loads of scientific software from source, it would be a lot of work to re-install these (a couple of days at least) Especially because the make files usually do not include mac systems and I need to edit those make files by hand. My first thought was to rebuild my directories using the build disk utility or disk warrior or drive genius. That is what I tried. When I verify the disk however using disk utility, everything freezes (eh, not a good sign I think). After say about 10 minutes it unfrreezes and says either everything is fine (no need for repair) or it gives an error and says it needs repair (weird). It did the same booting in target mode and using another mac disk utility. In those cases no troubles were found, which also seems awkward. However, I was not quite assured, so I decided to run Disk warrior. When I run a diagnosis, it finds 37% of the files dislocated, so that's not good. When I run it from the disk, I get an error and I can't rebuild after it does find troubles. I have not tried it yet from another mac. I have also repaired disk permissions, which seems to work. However, if I repair them twice, it again finds the same faulty disk permissions. In addition, when I try repair the permissions using disk warrior it runs into an error. Anyway, I guess what I am trying to say, is that my system does not seem to work properly. Other problems occur with X11, that crashes when a do a remote login and after that it can't run X windows (after the crash), while when I login as another user on the same machine, and I run the same login in the same version of X11, I dont have that problem. My question is, how should I proceed. I really would like to avoid installing all my software again. I also have a back-up drive, back-upped by Time machine. However, I am not sure if time machine recovers everything. (i.e. can you recover software that is installed in usr/local and uses a lot of lib's installed by hand. I mean, how do u know which files to recover etc..) I would appreciate any advice on this matter. kind regards daan meerburg One other question, though it seems a little misplaced, I'll refile it in mac hardware. I have serious troubles with my keyboard and trackpad. It stops working randomly. First I thought it was the same problem with the first versions of leopard, when the keyboard would sleep before everything else, but I now believe it is a hardware problem because when a apply pressure to the topcase it starts working again. Probably something is wrong with the connectors. I was wondering if this is a knows issue, because my macbook is just over a year old?