[180994] I can't reproduce this problem but there was a locking problem recently discovered in version 7 RSE. I've put the fix here although I can't be sure if it fixes the problem Dave D and Martin are seeing.

rse/plugins/org.eclipse.dstore.core/src/org/eclipse/dstore/core/miners/Miner.java

@@ -203,6 +203,7 @@ implements ISchemaExtender
 			DataElement cmd = (DataElement)_commandQueue.remove(0);
 			command(cmd);			
 		}
+		waitForInput();
 	}
 	
 	public final void requestCommand(DataElement command)

rse/plugins/org.eclipse.dstore.core/src/org/eclipse/dstore/core/model/CommandHandler.java

@@ -91,9 +91,9 @@ public abstract class CommandHandler extends Handler
 				{
 					_commands.add(command);
 				}
-			}
-			notifyInput();
+			}			
 		}
+		notifyInput();
 	}
 
 	/**

rse/plugins/org.eclipse.dstore.core/src/org/eclipse/dstore/core/model/UpdateHandler.java

@@ -155,9 +155,9 @@ public abstract class UpdateHandler extends Handler
 						}
 					}
 				}
-			}
-			notifyInput();
+			}			
 		}
+		notifyInput();
 	}
 	
 	/**