I have recently installed kubuntu 8.10, which uses Qt4, and after that downloaded and did make + make install of the latest Qt sources.

when I try from a command prompt to run i.e. gwenview i get:

Qt Code: 
  1. gwenview: symbol lookup error: /usr/lib/libQtDBus.so.4: undefined symbol: _ZN14QObjectPrivate15checkWindowRoleEv
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A web search indicated that the problem is probably due to conflicts between Kubuntu's Qt4 and the Qt4 I compiled.

Any hint on how to make them coexist peacefully?