People like me, just loving the uncomplicated way of using your apps wherever you want, and so using Portable Miranda, will actually face a major problem, connecting to the ICQ Network.
The package downloadable here, still contains the old ICQ.dll OscarJ-protocol in version 0.3.5.3. For ICQ having changed their servers on 10th of July, the old protocol is no longer accepted.
Joe@Whale, writer of the OscarJ-protocol says:
"Hi,
I noticed AOL is about to discontinue support for icq5... together with old error in 0.3.5.3 version it is not able to connect... I release new bugfix version 0.3.5.4 - it has fixed this problem and is still based on old code base. ALSO PLEASE NOTE: Development builds has this fixed for some time already."