File Checkout Issue

1) SharePoint 2007 have issues that files are locked out continuously and not able to edit/discard check out. A) clear the IE cache & local machine temp files. If the issue persist then ask the user to check in the file. Keep the version of list/library to maximum 10 numbers. If the issue still persist then save as file for local then change the file name & upload. Do the file edit. or Open a new file--> select open --> enter the url of the file & then do the changes

Bit version of servers in a farm

All application server should have same bit version. it is possible to have different bit version in search server, index server, application server. But there should be same bit version of two or more WFE or two or more back end similarly for search server.