[TheLastSuperman]

Originally Posted by skol

It's php specific,not just 5.3 or 5.4..What runs on 5.3.27 won't run on 5.3.17 and vice versa..So upgrading to 5.4 won't solve all the problems.

Yes I know as in old mods etc that use deprecated values etc and yes someone was upgraded to 4.2.2 and to php5.4 then had to move them back to 5.3.27 I believe and it worked fine (yeah 4.2.2 on 5.3.27 but then on another 4.2.2 site it would not function properly on 5.3.27 but it was new the owner said forget it Mike just install me 4.2.1 so he could get going with the site as it was brand new but not everyone can simply do that i.e. if their forum has been long standing and has thousands of threads and posts etc) long story short every site there's been an issue on was custom regarding modifications/plugins so in essence unless you do a test server/site (most host will accommodate that request for free if you call and explain what is going on to them, if not perhaps a nominal fee and you will more than likely need to edit your hosts file to view the new site on the different server IP) then you just don't know and that compatibility tab in the admincp does not work all the time, it's a band-aid per say you should do as the hint suggest and sort the issues properly.

I'm not recommending 4.2.2 at all now, same as vB5.x I suggest 4.2.1 but that's because of the mod issues as some owners simply don't want to deal with all that, had them tell me that on the phone despite me telling them 4.2.2 and 5.4 will ensure their site runs smoother for longer (if no issues).